SJW (SJW) 10-Q 28 Oct 24 2024 Q3 Quarterly report Financial data

Cover

Cover - shares	9 Months Ended
	Sep. 30, 2024	Oct. 21, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2024
Document Transition Report	false
Entity File Number	001-8966
Entity Registrant Name	SJW GROUP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0066628
Entity Address, Address Line One	110 West Taylor Street
Entity Address, City or Town	San Jose
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95110
City Area Code	(408)
Local Phone Number	279-7800
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	SJW
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		33,253,536
Entity Central Index Key	0000766829
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Amendment Flag	false

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Operating revenue	$ 225,063	$ 204,843	$ 550,619	$ 499,025
Production Expenses:
Purchased water	54,310	46,044	118,631	101,054
Power	3,396	2,785	8,560	7,363
Groundwater extraction charges	25,081	21,398	54,759	46,751
Other production expenses	12,919	12,415	36,020	36,379
Total production expenses	95,706	82,642	217,970	191,547
Administrative and general	25,708	23,888	71,964	71,759
Maintenance	8,512	6,457	23,080	18,813
Property taxes and other non-income taxes	9,361	8,795	26,610	25,092
Depreciation and amortization	27,423	26,455	84,159	78,872
Total operating expense	166,710	148,237	423,783	386,083
Operating income	58,353	56,606	126,836	112,942
Other (expense) income:
Interest on long-term debt and other interest expense	(17,516)	(16,744)	(53,394)	(48,913)
Pension non-service credit (cost)	940	(740)	2,829	(906)
Other, net	(1,197)	1,661	2,659	7,042
Income before income taxes	40,580	40,783	78,930	70,165
Provision for income taxes	1,928	4,561	7,883	4,127
Net income	38,652	36,222	71,047	66,038
Other comprehensive income (loss), net	0	318	(442)	420
Comprehensive income	$ 38,652	$ 36,540	$ 70,605	$ 66,458
Earnings per share
Basic (in usd per share)	$ 1.17	$ 1.14	$ 2.19	$ 2.10
Diluted (in usd per share)	1.17	1.13	2.18	2.09
Dividends per share (in usd per share)	$ 0.40	$ 0.38	$ 1.20	$ 1.14
Weighted average shares outstanding
Basic (in shares)	32,896,967	31,862,518	32,458,666	31,436,077
Diluted (in shares)	32,982,580	31,934,636	32,530,954	31,526,732

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Utility plant:
Land	$ 44,646	$ 41,415
Depreciable plant and equipment	4,141,490	3,967,911
Construction work in progress	203,040	106,980
Intangible assets	64,372	35,946
Total utility plant	4,453,548	4,152,252
Less: accumulated depreciation and amortization	1,047,631	981,598
Net utility plant	3,405,917	3,170,654
Nonutility properties and real estate investments	1,352	13,350
Less: accumulated depreciation and amortization	97	194
Net nonutility properties and real estate investments	1,255	13,156
Current assets:
Cash and cash equivalents	3,967	9,723
Accounts receivable:
Customers, net of allowances for uncollectible accounts of $848 and $6,551 on September 30, 2024 and December 31, 2023, respectively	75,849	67,870
Income tax	11,262	5,187
Other	6,286	3,684
Accrued unbilled utility revenue	68,342	49,543
Assets held for sale	0	40,850
Prepaid expenses	15,411	11,110
Current regulatory assets	828	4,276
Other current assets	5,331	6,146
Total current assets	187,276	198,389
Other assets:
Regulatory assets, less current portion	253,162	235,910
Investments	18,213	16,411
Postretirement benefit plans	39,387	33,794
Other intangible asset	0	28,386
Goodwill	640,311	640,311
Other	6,781	8,056
Total other assets	957,854	962,868
Total assets	4,552,302	4,345,067
Stockholders’ equity:
Common stock, $0.001 par value; authorized 70,000,000 shares; issued and outstanding shares 33,226,735 on September 30, 2024 and 32,023,004 on December 31, 2023	33	32
Additional paid-in capital	804,848	736,191
Retained earnings	527,575	495,383
Accumulated other comprehensive income	1,349	1,791
Total stockholders’ equity	1,333,805	1,233,397
Long-term debt, less current portion	1,673,715	1,526,699
Total capitalization	3,007,520	2,760,096
Current liabilities:
Lines of credit	93,235	171,500
Current portion of long-term debt	8,088	48,975
Accrued groundwater extraction charges, purchased water and power	38,433	24,479
Accounts payable	44,480	46,121
Accrued interest	19,549	15,816
Accrued payroll	12,180	12,229
Current regulatory liabilities	1,770	3,059
Other current liabilities	26,314	20,795
Total current liabilities	244,049	342,974
Deferred income taxes	268,370	238,528
Advances for construction	150,546	146,582
Contributions in aid of construction	336,559	326,451
Postretirement benefit plans	48,158	46,836
Regulatory liabilities, less current portion	473,899	461,108
Other noncurrent liabilities	23,201	22,492
Commitments and contingencies
Total capitalization and liabilities	$ 4,552,302	$ 4,345,067

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Allowance for uncollectible accounts	$ 848	$ 6,551
Capitalization:
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	70,000,000	70,000,000
Common stock, shares issued (in shares)	33,226,735	32,023,004
Common stock, shares outstanding (in shares)	33,226,735	32,023,004

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance (in shares) at Dec. 31, 2022		30,801,912
Beginning balance at Dec. 31, 2022	$ 1,110,868	$ 31	$ 651,004	$ 458,356	$ 1,477
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,530			11,530
Unrealized gain (loss) on investment, net of taxes	93				93
Stock-based compensation	1,177		1,199	(22)
Issuance of restricted and deferred stock units (in shares)		38,776
Issuance of restricted and deferred stock units	(1,538)		(1,538)
Employee stock purchase plan (in shares)		16,410
Employee stock purchase plan	1,080		1,080
Common stock issuance, net of costs (in shares)		570,026
Common stock issuance, net of costs	40,997		40,997
Dividends paid	(11,722)			(11,722)
Ending balance (in shares) at Mar. 31, 2023		31,427,124
Ending balance at Mar. 31, 2023	1,152,485	$ 31	692,742	458,142	1,570
Beginning balance (in shares) at Dec. 31, 2022		30,801,912
Beginning balance at Dec. 31, 2022	1,110,868	$ 31	651,004	458,356	1,477
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	66,038
Ending balance (in shares) at Sep. 30, 2023		31,933,003
Ending balance at Sep. 30, 2023	1,220,253	$ 32	729,740	488,585	1,896
Beginning balance (in shares) at Mar. 31, 2023		31,427,124
Beginning balance at Mar. 31, 2023	1,152,485	$ 31	692,742	458,142	1,570
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	18,286			18,286
Unrealized gain (loss) on investment, net of taxes	8				8
Stock-based compensation	1,122		1,139	(17)
Issuance of restricted and deferred stock units (in shares)		13,429
Issuance of restricted and deferred stock units	(20)		(20)
Common stock issuance, net of costs (in shares)		290,477
Common stock issuance, net of costs	22,782	$ 1	22,781
Dividends paid	(11,947)			(11,947)
Ending balance (in shares) at Jun. 30, 2023		31,731,030
Ending balance at Jun. 30, 2023	1,182,716	$ 32	716,642	464,464	1,578
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	36,222			36,222
Unrealized gain (loss) on investment, net of taxes	318				318
Stock-based compensation	1,230		1,238	(8)
Issuance of restricted and deferred stock units (in shares)		14,840
Issuance of restricted and deferred stock units	(706)		(706)
Employee stock purchase plan (in shares)		17,712
Employee stock purchase plan	1,061		1,061
Common stock issuance, net of costs (in shares)		169,421
Common stock issuance, net of costs	11,505		11,505
Dividends paid	(12,093)			(12,093)
Ending balance (in shares) at Sep. 30, 2023		31,933,003
Ending balance at Sep. 30, 2023	$ 1,220,253	$ 32	729,740	488,585	1,896
Beginning balance (in shares) at Dec. 31, 2023	32,023,004	32,023,004
Beginning balance at Dec. 31, 2023	$ 1,233,397	$ 32	736,191	495,383	1,791
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,699			11,699
Unrealized gain (loss) on investment, net of taxes	(442)				(442)
Stock-based compensation	1,529		1,538	(9)
Issuance of restricted and deferred stock units (in shares)		30,432
Issuance of restricted and deferred stock units	(1,215)		(1,215)
Employee stock purchase plan (in shares)		21,755
Employee stock purchase plan	1,101		1,101
Common stock issuance, net of costs (in shares)		126,025
Common stock issuance, net of costs	7,006		7,006
Dividends paid	(12,824)			(12,824)
Ending balance (in shares) at Mar. 31, 2024		32,201,216
Ending balance at Mar. 31, 2024	$ 1,240,251	$ 32	744,621	494,249	1,349
Beginning balance (in shares) at Dec. 31, 2023	32,023,004	32,023,004
Beginning balance at Dec. 31, 2023	$ 1,233,397	$ 32	736,191	495,383	1,791
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 71,047
Ending balance (in shares) at Sep. 30, 2024	33,226,735	33,226,735
Ending balance at Sep. 30, 2024	$ 1,333,805	$ 33	804,848	527,575	1,349
Beginning balance (in shares) at Mar. 31, 2024		32,201,216
Beginning balance at Mar. 31, 2024	1,240,251	$ 32	744,621	494,249	1,349
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,696			20,696
Stock-based compensation	1,267		1,275	(8)
Issuance of restricted and deferred stock units (in shares)		9,083
Issuance of restricted and deferred stock units	(2)		(2)
Common stock issuance, net of costs (in shares)		458,605
Common stock issuance, net of costs	25,296	$ 1	25,295
Dividends paid	(12,900)			(12,900)
Ending balance (in shares) at Jun. 30, 2024		32,668,904
Ending balance at Jun. 30, 2024	1,274,608	$ 33	771,189	502,037	1,349
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	38,652			38,652
Stock-based compensation	1,558		1,566	(8)
Issuance of restricted and deferred stock units (in shares)		1,388
Issuance of restricted and deferred stock units	(1)		(1)
Employee stock purchase plan (in shares)		21,098
Employee stock purchase plan	1,087		1,087
Common stock issuance, net of costs (in shares)		535,345
Common stock issuance, net of costs	31,007		31,007
Dividends paid	$ (13,106)			(13,106)
Ending balance (in shares) at Sep. 30, 2024	33,226,735	33,226,735
Ending balance at Sep. 30, 2024	$ 1,333,805	$ 33	$ 804,848	$ 527,575	$ 1,349

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023
Statement of Stockholders' Equity [Abstract]
Unrealized gain (loss) on investment, tax expense (benefit)	$ (163)	$ 193	$ (37)	$ 0
Dividends per share (in usd per share)	$ 0.40	$ 0.38	$ 0.38	$ 0.38

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Operating activities:
Net income	$ 71,047	$ 66,038
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	85,811	80,544
Deferred income taxes	27,142	12,996
Stock-based compensation	4,379	3,576
Allowance for equity funds used during construction	(1,750)	(1,649)
Changes in operating assets and liabilities:
Accounts receivable and accrued unbilled utility revenue	(26,509)	(26,782)
Accounts payable and other current liabilities	(2,271)	557
Accrued groundwater extraction charges, purchased water and power	13,954	13,463
Tax receivable and payable, and other accrued taxes	(17,960)	690
Postretirement benefits	(2,363)	(1,851)
Regulatory assets and liabilities excluding cost of removal, income tax temporary differences, and postretirement benefits	836	16,092
Other changes, net	1,750	(4,371)
Net cash provided by operating activities	154,066	159,303
Investing activities:
Company-funded	(252,275)	(195,937)
Contributions in aid of construction	(18,757)	(13,604)
Additions to nonutility assets and real estate investments	0	(24,244)
Cost to retire utility plant, net of salvage	(2,286)	(908)
Proceeds from sale of real estate investments	40,669	0
Payments for business acquisitions	0	(7,286)
Other changes, net	(29)	238
Net cash used in investing activities	(232,678)	(241,741)
Financing activities:
Borrowings on line of credit	156,000	102,655
Repayments on line of credit	(235,149)	(133,800)
Long-term borrowings	150,329	70,000
Repayments of long-term borrowings	(43,053)	(3,062)
Issuance of common stock, net of issuance costs	63,309	75,284
Dividends paid	(38,830)	(35,762)
Receipts of advances and contributions in aid of construction	22,304	18,889
Refunds of advances for construction	(2,113)	(2,148)
Other changes, net	59	(895)
Net cash provided by financing activities	72,856	91,161
Net change in cash and cash equivalents	(5,756)	8,723
Cash and cash equivalents, beginning of period	9,723	12,344
Cash and cash equivalents, end of period	3,967	21,067
Cash paid during the period for:
Interest	52,299	44,132
Interest, net of amounts capitalized	49,716	42,199
Income taxes	1,292	818
Supplemental disclosure of non-cash activities:
Accrued payables for additions to utility plant	35,970	26,315
Utility property installed by developers	699	1,295
Proceeds receivable from sale of real estate investments	2,801	0
Accrued selling expenses on sale of real estate investments	2,201	0
Seller financing in asset acquisition, net of discount	$ 0	$ 15,400

General

General	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
General	General In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal, recurring adjustments) necessary for a fair presentation of the results for the interim periods. The unaudited interim financial information has been prepared in accordance with accounting principles generally accepted in the United States of America and in accordance with the instructions for Form 10-Q and Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission. The Notes to Consolidated Financial Statements in SJW Group’s 2023 Annual Report on Form 10-K should be read in conjunction with the accompanying unaudited condensed consolidated financial statements. SJW Group is a holding company with five wholly owned subsidiaries: San Jose Water Company (“SJWC”), SJWTX Holdings, Inc., SJW Land Company, SJWNE LLC, and National Water Utility Service, LLC (“National Water Utility”). SJWTX Holdings, Inc., is a holding company for its wholly owned subsidiaries, SJWTX, Inc., doing business as The Texas Water Company (“TWC”), Texas Water Operation Services, LLC, (“TWOS”) and Texas Water Resources, LLC (“TWR”). SJWNE LLC is the holding company for Connecticut Water Service, Inc. (“CTWS”) whose wholly owned subsidiaries are The Connecticut Water Company (“CWC”), The Maine Water Company (“MWC”), New England Water Utility Services, Inc. (“NEWUS”), and Chester Realty, Inc. National Water Utility is the contracting entity for shared services among the SJW Group affiliates formed in October 2024. SJWC, CWC, TWC , TWOS, TWR, MWC, NEWUS and National Water Utility are referred to as “Water Utility Services.” SJW Land Company and Chester Realty, Inc. are collectively referred to as “Real Estate Services.” Revenue Water sales are seasonal in nature and influenced by weather conditions. The timing of precipitation and climatic conditions can cause seasonal water consumption by customers to vary significantly. Due to the seasonal nature of the water business, the operating results for interim periods are not indicative of the operating results for a 12-month period. Revenue is generally higher in the warm, dry summer months when water usage and sales are greater, and lower in the winter months when cooler temperatures and increased precipitation curtail water usage resulting in lower sales. SJW Group’s revenue components are as follows: Three months ended September 30, Nine months ended September 30, 2024 2023 2024 2023 Revenue from contracts with customers $ 216,677 211,716 $ 539,790 507,276 Alternative revenue programs, net 7,369 957 6,847 (2,638) Other balancing and memorandum accounts and regulatory mechanisms, net (1,432) (9,260) (1,019) (9,906) Rental income 2,449 1,430 5,001 4,293 $ 225,063 204,843 $ 550,619 499,025 Nonutility Properties and Real Estate Investments The major components of nonutility properties and real estate investments as of September 30, 2024 and December 31, 2023, are as follows: September 30, December 31, Land $ 915 4,137 Wholesale water supply assets — 8,465 Buildings and improvements 437 748 Subtotal 1,352 13,350 Less: accumulated depreciation and amortization 97 194 Total $ 1,255 13,156 In March 2023, SJW Land Company entered into a broker agreement to sell its warehouse, office building, and land property located in Knoxville, Tennessee. The company reclassified the Tennessee properties from held-and-used to held-for-sale at March 31, 2023. The company recorded the Tennessee properties at the lower of their carrying value or estimated fair value less cost to sell, and also stopped recording depreciation on assets held for sale. SJW Group's broker provided the estimated fair value of the Tennessee properties. In April 2024, SJW Land Company completed the sale of a warehouse building of the Tennessee properties for $27,000. The pre-tax gain on the sale was $6,918. In June 2024, SJW Land Company completed the sale of an office building, land, and parking lot of the Tennessee properties for $17,000. The pre-tax loss on the sale was $7,887. The net pre-tax loss associated with these transactions for the nine months ended September 30, 2024 was $969 and is included in the “Other, net” line on the condensed consolidated statements of comprehensive income. A portion of the proceeds from these sales totaling $2,801 is being held in escrow pending completion of certain post-closing obligations. As a result of these two transactions, the sale of the Tennessee properties is complete and the company does not have any other assets held for sale. The sale of the Tennessee properties does not represent a strategic shift that has or will have a major effect on SJW Group; therefore, the sale does not qualify for treatment as a discontinued operation. The Tennessee properties are included in SJW Group’s “Real Estate Services” reportable segment in Note 9 , “Segment and Non-Tariffed Business Reporting”. The following represents the major components of the Tennessee properties that were recorded in assets held-for-sale on the condensed consolidated balance sheets as of December 31, 2023: December 31, Land $ 13,170 Buildings and improvements 44,950 Subtotal 58,120 Less: accumulated depreciation and amortization 17,270 Total $ 40,850 In August 2023, a non-regulated subsidiary, TWR, acquired eight wells and the associated water rights of KT Water Resources, LLC, as discussed in Note 10 , “Acquisitions”. In connection with a transaction in the third quarter of 2024, TWC purchased these assets from TWR for use in utility operations. Accordingly, SJW Group reclassified $28,386 related to indefinite life water rights from other intangible assets to utility plant intangible assets and $11,684 from nonutility property to utility plant. Fair Value Measurement The following instruments are not measured at fair value on SJW Group’s condensed consolidated balance sheets as of September 30, 2024, but require disclosure of their fair values: cash and cash equivalents, accounts receivable and accounts payable. The estimated fair value of such instruments as of September 30, 2024 approximates their carrying value as reported on the condensed consolidated balance sheets. There have been no changes in valuation techniques during the three and nine months ended September 30, 2024. The fair value of these instruments would be categorized as Level 2 in the fair value hierarchy, with the exception of cash and cash equivalents, which would be categorized as Level 1. The fair value of SJW Group’s long-term debt was $1,534,801 and $1,394,412 as of September 30, 2024 and December 31, 2023, respectively, and was determined using a discounted cash flow analysis, based on the current rates for similar financial instruments of the same duration and creditworthiness of the company. Of the total fair value of long-term debt at September 30, 2024 and December 31, 2023, $1,518,400 and $1,378,683, respectively, would be categorized as Level 2 in the fair value hierarchy and $16,401 and $15,729, respectively, would be categorized as Level 3 in the fair value hierarchy. CTWS’s additional retirement benefits under the supplemental executive retirement plans and retirement contracts are funded by investment assets held by a Rabbi Trust. The fair value of the money market funds, mutual funds and fixed income investments in the Rabbi Trust was $2,952 and $2,833 as of September 30, 2024 and December 31, 2023, respectively, and are categorized as Level 1 in the fair value hierarchy. Earnings per Share Basic earnings per share is calculated using income available to common stockholders, divided by the weighted average number of shares outstanding during the period. Diluted earnings per share is calculated using income available to common stockholders divided by the weighted average number of shares of common stock including both shares outstanding and shares potentially issuable in connection with restricted common stock awards under SJW Group’s long-term incentive plans, shares potentially issuable under the performance stock plans assumed through the business combination with CTWS, and shares potentially issuable under SJW Group’s employee stock purchase plans. For the three months ended September 30, 2024 and 2023, 485 and 1,826 anti-dilutive restricted common stock units were excluded from the diluted earnings per share calculation, respectively. For the nine months ended September 30, 2024 and 2023, 5,289 and 12,524 anti-dilutive restricted common stock units were excluded from the diluted earnings per share calculation, respectively. Accounts Receivable During the second quarter of 2024, SJW Group recorded a reduction to its allowance for credit losses of $7,822, of which $3,960 resulted in a reduction to regulatory assets and $3,862 was recorded through administrative and general expense ($2,782 net of tax or $0.09 per diluted share for the nine months ended September 30, 2024). New Accounting Standards The recently issued accounting standards that have not yet been adopted by the company as of September 30, 2024 are as follows: Standard Description Date of Adoption Application Effect on the Condensed Consolidated Financial Statements Accounting Standards Update (“ASU”) 2023-07 “Improvements to Reportable Segment Disclosures” The ASU requires disclosure of significant segment expenses, extends certain annual disclosures to interim periods, and requires additional qualitative disclosures regarding the chief operating decision maker. The ASU is effective for SJW Group beginning with its annual financial statements for the year ending December 31, 2024. Early adoption is permitted. Retrospective SJW Group is currently evaluating the requirements of ASU 2023-07. ASU 2023-09 “Improvements to Income Tax Disclosures” The ASU amends certain income tax disclosure requirements, including adding requirements to present the reconciliation of income tax expense computed at the statutory rate to actual income tax expense using both percentages and amounts and providing a disaggregation of income taxes paid. Further, certain disclosures are eliminated, including the current requirement to disclose information on changes in unrecognized tax benefits in the next 12 months. The ASU is effective for SJW Group beginning with its annual financial statements for the year ending December 31, 2025. Early adoption is permitted. Prospective, with retrospective application also permitted. SJW Group is currently evaluating the requirements of ASU 2023-09.

Regulatory Matters

Regulatory Matters	9 Months Ended
	Sep. 30, 2024
Regulated Operations [Abstract]
Regulatory Matters	Regulatory Matters Regulatory assets and liabilities are comprised of the following as of September 30, 2024 and December 31, 2023: September 30, 2024 December 31, 2023 Regulatory assets: Income tax temporary differences (a) $ 173,671 157,669 Unrecognized pensions and other postretirement benefits (b) 24,593 24,593 Business combinations debt premium (c) 12,948 14,855 Employee benefit costs (d) 5,433 9,815 Monterey Water Revenue Adjustment Mechanism (“MWRAM”) (e) 10,327 9,361 Customer Assistance Program (“CAP”) balancing account (f) 6,683 5,457 Catastrophic event memorandum accounts (“CEMA”) (g) 975 4,819 2022 general rate case interim memorandum account (h) 3,354 4,571 Revenue adjustment mechanisms (n) 2,528 — Water supply costs (i) — 583 Other (j) 13,478 8,463 Total regulatory assets 253,990 240,186 Less: current regulatory assets (k) 828 4,276 Total regulatory assets, less current portion $ 253,162 235,910 Regulatory liabilities: Cost of removal (l) 360,176 346,418 Future income tax benefits due to customers (m) 85,966 88,610 Unrecognized pensions and other postretirement benefits (b) 20,515 20,196 Revenue adjustment mechanisms (n) 1,770 5,536 Water supply costs (i) 3,648 — Other (o) 3,594 3,407 Total regulatory liabilities 475,669 464,167 Less: current regulatory liabilities (p) 1,770 3,059 Total regulatory liabilities, less current portion $ 473,899 461,108 ___________________________________ (a) Consists primarily of temporary income tax differences that are flowed through to customers, which will be recovered in future rates as these temporary differences reverse. The company expects to recover regulatory assets related to plant depreciation income tax temporary differences over the lives of the plant assets, which are between 4 to 100 years. (b) Represents actuarial losses and gains and prior service cost that have not yet been recognized as components of net periodic benefit cost for certain pension and other postretirement benefit plans. (c) Consists of debt fair value adjustments recognized through purchase accounting for the completed merger with CTWS in 2019. (d) Includes deferrals of pension and other postretirement benefit expense and cost of accrued benefits for vacation. (e) MWRAM is described in the following section. (f) Represents costs associated with SJWC’s CAP. (g) The California Public Utilities Commission (“CPUC”) has authorized water utilities to activate CEMA accounts in order to track savings and costs related to SJWC’s response to catastrophic events, which includes external labor and materials, increases in bad debt from suspension of shutoffs for non-payment, waived deposits and reconnection fees, and divergence from actual versus authorized usage. At December 31, 2023, the balance primarily relates to increased bad debt expenses associated with SJWC’s response to COVID-19. (h) Represents the difference between revenues collected in interim rates in effect as of January 1, 2022 and revenues that would result from rates authorized in SJWC’s 2022 general rate case retroactive to January 1, 2022. (i) Reflects primarily SJWC’s Full Cost Balancing Account which tracks differences in actual water supply costs compared to amounts assumed in base rates, including applicable changes and variations in costs and quantities that affect the overall mix of the water supply. (j) Other includes other balancing and memorandum accounts and regulatory mechanisms, deferred costs for certain information technology activities, asset retirement obligations, tank painting, well reconditioning and rate case expenses. (k) As of September 30, 2024, primarily relates to the current portion of CWC’s deferred well redevelopment and rate case costs. As of December 31, 2023, primarily relates to the current portion of MWRAM. (l) Represents amounts collected in rates from customers for estimated costs to retire assets at the end of their expected useful lives before the costs are incurred. (m) On December 22, 2017 the Tax Cuts and Jobs Act of 2017 (the "Tax Act”) was signed into law. The Tax Act included a reduction in the federal income tax rate from 35% to 21%. The rate reduction was effective on January 1, 2018 and resulted in a regulatory liability for the excess deferred income taxes. The benefit of amortization of excess deferred income taxes flows back to the customers under current normalization rules and agreed upon methods with the commissions. (n) Consists of Water Rate Adjustment mechanism (“WRA”) and Water Conservation Memorandum Account (“WCMA”),which are described in the following section. (o) Other includes other balancing and memorandum accounts, other regulatory mechanisms and accrued tank painting costs. (p) As of September 30, 2024 and December 31, 2023, primarily relates to the current portion of WRA. SJWC has established balancing accounts for the purpose of tracking the under-collection or over-collection associated with expense changes and the revenue authorized by the CPUC to offset those expense changes. SJWC has been authorized for the use of the Full Cost Balancing Account to track water supply costs and energy consumption. The MWRAM balancing account tracks the difference between the revenue received for actual metered sales through the tiered volumetric rate and the revenue that would have been received with the same actual metered sales if a uniform rate would have been in effect. SJWC also maintains memorandum accounts to track impacts due to catastrophic events, certain unforeseen water quality expenses related to new federal and state water quality standards, energy efficiency, water conservation, water tariffs, and other approved activities or as directed by the CPUC. The WCMA allows SJWC to track lost revenue, net of related water costs, associated with reduced sales due to water conservation and associated calls for water use reductions, both mandatory and voluntary. SJWC records the lost revenue captured in the WCMA balancing accounts. Applicable drought surcharges collected are used to offset the revenue losses tracked in the WCMA. All balancing accounts and memorandum accounts not included for recovery or refund in the current general rate case will be reviewed by the CPUC in SJWC’s next general rate case or at the time an individual account balance reaches a threshold of 2% of authorized revenue, whichever occurs first. CWC has been authorized by the Connecticut Public Utilities Regulatory Authority (“PURA”) to utilize a WRA, a decoupling mechanism, to mitigate risk associated with changes in demand. The WRA is used to reconcile actual water demands with the demands projected in the most recent general rate case and allows the company to implement a surcharge or sur-credit as necessary to recover or refund the revenues approved in the general rate case. The WRA allows the company to defer, as a regulatory asset or liability, the amount by which actual revenues deviate from the revenues allowed in the most recent general rate proceedings. As of September 30, 2024 and December 31, 2023, SJW Group’s regulatory assets not earning a return primarily included unrecognized pensions and other postretirement benefits and business combination debt premiums. The total amount of regulatory assets not earning a return at September 30, 2024 and December 31, 2023, either by interest on the regulatory asset or as a component of rate base at the allowed rate of return, was $41,962 and $43,141, respectively.

Capitalization

Capitalization	9 Months Ended
	Sep. 30, 2024
Equity [Abstract]
Capitalization	Capitalization In March 2023, SJW Group entered into Amendment No. 1 to the equity distribution agreement (the “Equity Distribution Agreement”), dated November 17, 2021, between SJW Group and J.P. Morgan Securities LLC, Janney Montgomery Scott LLC, RBC Capital Markets, LLC and Wells Fargo Securities, LLC, pursuant to which the company may offer and sell shares of its common stock, $0.001 par value per share, from time to time in “at-the-market” offerings, having an aggregate gross sales price of up to $240,000. For the three and nine months ended September 30, 2024, SJW Group issued and sold a total of 535,345 and 1,119,975 shares of common stock, respectively, at a weighted average price of $59.17 and $57.70 per share, respectively, and received $31,007 and $63,309 in net proceeds, respectively, under the Equity Distribution Agreement. Since the inception of the Equity Distribution Agreement, SJW Group has issued and sold 3,124,632 shares of common stock at a weighted average price of $67.88 for a total net proceeds of $207,307 and has $27,889 of aggregate gross sales price of shares remaining to issue under the Equity Distribution Agreement as of September 30, 2024.

Lines of Credit and Long-Term L

Lines of Credit and Long-Term Liabilities	9 Months Ended
	Sep. 30, 2024
Debt Disclosure [Abstract]
Lines of Credit and Long-Term Liabilities	Lines of Credit and Long-Term Liabilities SJW Group’s contractual obligations and commitments include senior notes, bank term loans, revenue bonds, state revolving fund loans and other obligations. Lines of Credit In August 2024, SJW Group, SJWC, TWC, and CTWS entered into an amendment to its credit agreement with JPMorgan Chase Bank and a syndicate of banks, which provided, among other matters, for an extension of the maturity date from August 2, 2028 to August 2, 2029. The weighted average interest rate on short-term borrowings outstanding at September 30, 2024, was 6.61%, compared to 6.48% at December 31, 2023. As of September 30, 2024, the unused portion of the lines of credit was $256,765. Long-term Financing Agreements On November 15, 2023, CWC entered into a note purchase agreement with certain institutional investors, pursuant to which the company sold an aggregate principal amount of $25,000 of its 6.46% Senior Notes, Series 2023 (“Series 2023 Notes”). The Series 2023 Notes are unsecured obligations of CWC and are due on January 1, 2054. Interest is payable semi-annually in arrears on January 15th and July 15th of each year. The closing of the notes purchase agreement occurred in January 2024. On July 31, 2024, SJWC entered into and closed a note purchase agreement with certain institutional investors, pursuant to which the company sold an aggregate principal amount of $75,000 of its 5.63% Senior Notes, Series Q (“Series Q Notes”). The Series Q Notes are unsecured obligations of SJWC and are due on July 31, 2054. Interest is payable semi-annually in arrears on January 31st and July 31st of each year. The Series Q Notes are also subject to customary events of default.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three and nine months ended September 30, 2024, income tax expense was $1,928 and $7,883, respectively. Income tax expense for the three and nine months ended September 30, 2023 was $4,561 and $4,127, respectively. The effective consolidated income tax rates were 5% and 11% for the three months ended September 30, 2024 and 2023, respectively, and 10% and 6% for the nine months ended September 30, 2024 and 2023, respectively. The lower effective tax rate for the three months ended September 30, 2024 was primarily due to a tax accounting method change related to the repairs deduction. The higher effective tax rate for the nine months ended September 30, 2024 was primarily due to lower discrete tax benefits in 2024. SJW Group had unrecognized tax benefits, before the impact of deductions of state taxes, excluding interest and penalties, of approximately $4,920 and $4,511 as of September 30, 2024 and December 31, 2023, respectively. SJW Group currently does not expect uncertain tax positions to change significantly over the next 12 months, except in the case of a lapse of the statute of limitations.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies SJW Group is subject to ordinary routine litigation incidental to its business. In October 2023, CWC, a subsidiary of SJW Group, was named as a defendant in a class action lawsuit alleging that the water provided by CWC contained contaminants. CWC intends to vigorously defend itself in this lawsuit. At this time, SJW Group is unable to provide a reasonable estimate of any loss. In September 2024, SJWC entered into a 12-year agreement with the City of Cupertino effective on October 1, 2024 pursuant to which SJWC will operate the City of Cupertino municipal water system, replacing the previous agreement with the City of Cupertino. The agreement can be extended for an additional term of eight years. In accordance with the new agreement, SJWC will pay an upfront concession fee of $22,100 in the fourth quarter of 2024. Additionally, SJWC agreed to pay an annual investment rent of $1,800, subject to increases each year based on a specified construction cost index.

Benefit Plans

Benefit Plans	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Benefit Plans	Benefit Plans SJW Group maintains noncontributory defined benefit pension plans for its eligible employees. SJWC employees hired before March 31, 2008 and CWC and MWC employees hired before January 1, 2009 are entitled to benefits under the pension plans based on the employee’s years of service and compensation. For SJWC employees hired on or after March 31, 2008, benefits are determined using a cash balance formula based upon compensation credits and interest credits for each employee. Starting in 2023, TWC employees are also eligible to participate under SJWC’s cash balance plan. Certain employees hired before March 1, 2012, and covered by a plan merged into the CWC plan in 2013 are also entitled to benefits based on the employee’s years of service and compensation. CTWS employees hired on or after January 1, 2009, are entitled to an additional 1.5% of eligible compensation to their company sponsored savings plan. SJW Group does not have multi-employer plans. In addition, senior management hired before March 31, 2008, for SJWC and January 1, 2009 for CWC, are eligible to receive additional retirement benefits under supplemental executive retirement plans and retirement contracts. SJWC’s senior management hired on or after March 31, 2008, are eligible to receive additional retirement benefits under SJWC’s Cash Balance Executive Supplemental Retirement Plan. The supplemental retirement plans and Cash Balance Executive Supplemental Retirement Plan are non-qualified plans in which only senior management and other designated members of management may participate. SJW Group also provides health care and life insurance benefits for retired employees under employer-sponsored postretirement benefits that are not pension plans. The components of net periodic benefit costs for the defined benefit plans and other postretirement benefits for the three and nine months ended September 30, 2024 and 2023 are as follows: Pension Benefits Other Benefits Three months ended September 30, 2024 2023 2024 2023 Service cost $ 1,666 1,892 $ 166 160 Interest cost 3,613 3,557 295 317 Expected return on assets (4,463) (3,442) (267) (217) Amortization of actuarial (gain) loss (18) 554 (161) (87) Amortization of prior service cost 4 4 — — Total $ 802 2,565 $ 33 173 Pension Benefits Other Benefits Nine months ended September 30, 2024 2023 2024 2023 Service cost $ 4,997 5,676 $ 498 480 Interest cost 10,839 10,672 886 951 Expected return on assets (13,389) (11,580) (801) (651) Amortization of actuarial (gain) loss (53) 1,662 (483) (263) Amortization of prior service cost 11 11 — — Total $ 2,405 6,441 $ 100 517 For the three and nine months ended September 30, 2024, SJW Group has made $2,258 and $4,516, respectively, of contributions to such plans. SJW Group does not expect to make any additional required and discretionary cash contributions to the pension plans and other postretirement benefit plans for the remainder of 2024.

Equity Plans

Equity Plans	9 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Equity Plans	Equity Plans SJW Group’s long-term incentive plans provide employees, non-employee board members or the board of directors of any parent or subsidiary, consultants, and other independent advisors who provide services to the company or subsidiary the opportunity to acquire an equity interest in SJW Group. SJW Group also maintains stock plans in connection with its acquisition of CTWS which are no longer granting new stock awards. In addition, shares are issued to employees under SJW Group’s employee stock purchase plan (“ESPP”). As of September 30, 2024, 187,810 shares are issuable upon the vesting of outstanding restricted stock units and deferred restricted stock units and an additional 1,038,040 shares are available for award issuances under the long-term incentive plans. A summary of compensation costs charged to income, by award type, and proceeds from the ESPP, are presented below for the three and nine months ended September 30, 2024 and 2023: Three months ended September 30, Nine months ended September 30, 2024 2023 2024 2023 Compensation costs charged to income: ESPP $ 259 187 $ 454 378 Restricted stock and deferred restricted stock 1,307 1,051 3,925 3,198 Total compensation costs charged to income $ 1,566 1,238 $ 4,379 3,576 ESPP proceeds $ 1,087 1,061 $ 2,188 2,141 Restricted Stock and Deferred Restricted Stock For the three months ended September 30, 2024, there was no grant activity of service-based restricted stock awards. For the three months ended September 30, 2023, SJW Group granted 968 one-year and three-year service-based restricted stock awards with a weighted average grant date fair value per unit of $63.96. For the nine months ended September 30, 2024 and 2023, SJW Group granted 64,482 and 38,310, respectively, one-year and three-year service-based restricted stock awards with a weighted average grant date fair value per unit of $56.70 and $76.88, respectively. For the three months ended September 30, 2024 and 2023, there was no grant activity of performance-based or market-based restricted stock awards. For the nine months ended September 30, 2024 and 2023, SJW Group granted 45,763 and 31,345 target units, respectively, of performance-based and market-based restricted stock awards with a weighted average grant date fair value per unit of $55.60 and $80.05, respectively. Based upon actual attainment relative to the target performance metric, the number of shares issuable can range between 0% to 150% of the target number of shares for performance-based restricted stock awards, or between 0% and 200% of the target number of shares for market-based restricted stock awards. As of September 30, 2024, the total unrecognized compensation costs related to restricted and deferred restricted stock plans was $6,739. This cost is expected to be recognized over a weighted average period of 1.77 years. Employee Stock Purchase Plan The total unrecognized compensation costs related to the semi-annual offering period that ends January 31, 2025, for the ESPP is approximately $135. This cost is expected to be recognized during the fourth quarter of 2024.

Segment and Non-Tariffed Busine

Segment and Non-Tariffed Business Reporting	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Segment and Non-Tariffed Business Reporting	Segment and Non-Tariffed Business Reporting SJW Group is a holding company with five subsidiaries: (i) SJWC, (ii) SJWTX Holdings, Inc., a holding company for TWC, its consolidated variable interest entity, Acequia Water Supply Corporation, TWOS and TWR, (iii) SJW Land Company, (iv) SJWNE LLC, a holding company for CTWS and its subsidiaries, CWC, MWC, NEWUS and Chester Realty, Inc., and (v) National Water Utility. The first segment provides water utility and utility-related services to its customers through SJW Group’s subsidiaries, SJWC, CWC, TWC, MWC, NEWUS, and National Water Utility together referred to as “Water Utility Services.” Water Utility Services’ activities are water utility operations with both regulated and non-tariffed businesses. The second segment consists of property management and investment activity conducted by SJW Land Company and Chester Realty, Inc., referred to as “Real Estate Services.” SJW Group’s reportable segments have been determined based on information used by the chief operating decision maker. SJW Group’s chief operating decision maker includes the Chairman, President and Chief Executive Officer, and his executive staff. The executive staff reviews financial information presented on a consolidated basis that is accompanied by disaggregated information about operating revenue, net income and total assets, by subsidiary. The following tables set forth information relating to SJW Group’s reportable segments and distribution of regulated and non-tariffed business activities within the reportable segments. Certain allocated assets, such as goodwill, revenue and expenses have been included in the reportable segment amounts. Other business activity of SJW Group not included in the reportable segments is included in the “All Other” category. For Three Months Ended September 30, 2024 Water Utility Services (1) Real Estate Services All Other (2) SJW Group Regulated Non-tariffed Non-tariffed Non-tariffed Regulated Non-tariffed Total Operating revenue $ 220,938 4,103 22 — 220,938 4,125 225,063 Operating expense 161,929 2,799 205 1,777 161,929 4,781 166,710 Operating income (loss) 59,009 1,304 (183) (1,777) 59,009 (656) 58,353 Net income (loss) 43,751 915 34 (6,048) 43,751 (5,099) 38,652 Depreciation and amortization 27,113 85 1 224 27,113 310 27,423 Interest on long-term debt and other interest expense 11,516 75 — 5,925 11,516 6,000 17,516 Provision (benefit) for income taxes 1,182 389 15 342 1,182 746 1,928 For Three Months Ended September 30, 2023 Water Utility Services (1) Real Estate Services All Other (2) SJW Group Regulated Non-tariffed Non-tariffed Non-tariffed Regulated Non-tariffed Total Operating revenue $ 199,537 3,876 1,430 — 199,537 5,306 204,843 Operating expense 144,102 2,337 691 1,107 144,102 4,135 148,237 Operating income (loss) 55,435 1,539 739 (1,107) 55,435 1,171 56,606 Net income (loss) 37,545 2,198 563 (4,084) 37,545 (1,323) 36,222 Depreciation and amortization 26,147 84 1 223 26,147 308 26,455 Interest on long-term debt and other interest expense 10,839 112 — 5,793 10,839 5,905 16,744 Provision (benefit) for income taxes 5,933 428 196 (1,996) 5,933 (1,372) 4,561 For Nine Months Ended September 30, 2024 Water Utility Services (1) Real Estate Services All Other (2) SJW Group Regulated Non-tariffed Non-tariffed Non-tariffed Regulated Non-tariffed Total Operating revenue $ 537,899 10,146 2,574 — 537,899 12,720 550,619 Operating expense 411,959 6,788 1,391 3,645 411,959 11,824 423,783 Operating income (loss) 125,940 3,358 1,183 (3,645) 125,940 896 126,836 Net income (loss) 82,307 2,145 617 (14,022) 82,307 (11,260) 71,047 Depreciation and amortization 83,231 255 3 670 83,231 928 84,159 Interest on long-term debt and other interest expense 35,095 520 — 17,779 35,095 18,299 53,394 Provision (benefit) for income taxes 10,203 1,008 213 (3,541) 10,203 (2,320) 7,883 For Nine Months Ended September 30, 2023 Water Utility Services (1) Real Estate Services All Other (2) SJW Group Regulated Non-tariffed Non-tariffed Non-tariffed Regulated Non-tariffed Total Operating revenue $ 485,334 9,398 4,293 — 485,334 13,691 499,025 Operating expense 375,647 5,540 2,251 2,645 375,647 10,436 386,083 Operating income (loss) 109,687 3,858 2,042 (2,645) 109,687 3,255 112,942 Net income (loss) 71,277 3,412 1,532 (10,183) 71,277 (5,239) 66,038 Depreciation and amortization 77,644 253 305 670 77,644 1,228 78,872 Interest on long-term debt and other interest expense 32,232 112 — 16,569 32,232 16,681 48,913 Provision (benefit) for income taxes 8,759 1,071 581 (6,284) 8,759 (4,632) 4,127 ____________________ (1) The “Water Utility Services” category for the three and nine months ended September 30, 2024 and 2023, includes the accounts of SJWC, CWC, TWC, MWC, and NEWUS on a stand-alone basis. (2) The “All Other” category for the three and nine months ended September 30, 2024 and 2023, includes the accounts of SJW Group, SJWNE LLC, CTWS and SJWTX Holdings, Inc. on a stand-alone basis. SJW Group’s assets by segment are as follows: September 30, 2024 December 31, 2023 Water Utility Services: Regulated $ 4,496,972 4,199,172 Non-tariffed 1,424 43,532 Total water utility services 4,498,396 4,242,704 Real Estate Services 849 44,222 All Other 53,057 58,141 Total assets $ 4,552,302 4,345,067 Regulated $ 4,496,972 4,199,172 Non-tariffed 55,330 145,895 Total assets $ 4,552,302 4,345,067

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2024
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract]
Acquisitions	Acquisitions In January 2023, TWC reached an agreement to acquire KT Water Development Ltd. (“KT Water Development”) and SJWTX Holdings, Inc. reached an agreement to acquire KT Water Resources, L.P. (“KT Water Resources”). The agreement between SJWTX Holdings, Inc. and KT Water Resources was assigned to TWR prior to closing. KT Water Development was an investor-owned water utility providing water to approximately 1,725 people through over 570 service connections in the Rockwall Ranch subdivision in southern Comal County, Texas. KT Water Resources was a wholesale groundwater resource supplier to KT Water Development formed to develop wholesale water supplies for the fast-growing utilities of Comal County, Texas. The Public Utility Commission of Texas (“PUCT”) approved the proposed KT Water Development acquisition on July 24, 2023. The acquisition of KT Water Resources did not require PUCT approval. Both transactions closed on August 14, 2023. Further information regarding each of the acquisitions is set forth below. KT Water Development The purchase price of KT Water Development was $7,338, all of which was cash, and was determined in accordance with a fair market value process defined under the Texas Water Code. The transaction was accounted for as a business combination in accordance with Accounting Standards Codification (“ASC”) Topic 805—“Business Combinations.” The transaction consideration was allocated to utility plant. The final purchase price allocation was completed during the quarter ended March 31, 2024, with no change from the preliminary purchase price allocation. Transaction costs were not material. The results of KT Water Development have been included in SJW Group’s consolidated statements of comprehensive income since the acquisition date and were not material. Pro forma financial information has not been presented because the acquisition was not material to SJW Group’s consolidated financial statements. KT Water Resources The total purchase price of KT Water Resources of $39,891 and consisted of a $24,491 up-front cash payment and an obligation for a post-closing production payment with an acquisition date fair value of $15,400. Considering transaction costs of $170, the total cost of the acquisition was $40,061. The KT Water Resources acquisition was accounted for as an asset acquisition in accordance with ASC Topic 805. The total cost was allocated as follows based on the fair values of the assets acquired: $28,386 to other intangible asset, $11,684 to nonutility property, and $9 to other current liabilities. The other intangible asset represents indefinite life water rights. The nonutility property consists of wells, land, easements, and construction work in progress. The post-closing production payment represents an obligation to pay a total amount of $29,000 to the seller over a period up to 29 years. The repayment schedule is based on the quantity of groundwater produced from the acquired wells, subject to certain provisions in the purchase agreement. The fair value of the post-closing payment as of the acquisition date was determined by discounting forecasted repayments based on management’s estimates of future groundwater production. The difference between the fair value of $15,400 and the gross obligation of $29,000 was recorded as a debt discount and is being amortized as interest expense using the effective interest method over the life of the obligation. The post-closing production payment obligation is classified as long-term debt in the condensed consolidated balance sheets.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023
Pay vs Performance Disclosure
Net income (loss)	$ 38,652	$ 20,696	$ 11,699	$ 36,222	$ 18,286	$ 11,530	$ 71,047	$ 66,038

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Sep. 30, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

General (Policies)

General (Policies)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Accounting	The unaudited interim financial information has been prepared in accordance with accounting principles generally accepted in the United States of America and in accordance with the instructions for Form 10-Q and Rule 10-01 of Regulation S-X promulgated by the Securities and Exchange Commission. The Notes to Consolidated Financial Statements in SJW Group’s 2023 Annual Report on Form 10-K should be read in conjunction with the accompanying unaudited condensed consolidated financial statements.
Revenue	Revenue Water sales are seasonal in nature and influenced by weather conditions. The timing of precipitation and climatic conditions can cause seasonal water consumption by customers to vary significantly. Due to the seasonal nature of the water business, the operating results for interim periods are not indicative of the operating results for a 12-month period. Revenue is generally higher in the warm, dry summer months when water usage and sales are greater, and lower in the winter months when cooler temperatures and increased precipitation curtail water usage resulting in lower sales.
Fair Value Measurement	Fair Value Measurement
Earnings per Share	Earnings per Share
New Accounting Standards	New Accounting Standards The recently issued accounting standards that have not yet been adopted by the company as of September 30, 2024 are as follows: Standard Description Date of Adoption Application Effect on the Condensed Consolidated Financial Statements Accounting Standards Update (“ASU”) 2023-07 “Improvements to Reportable Segment Disclosures” The ASU requires disclosure of significant segment expenses, extends certain annual disclosures to interim periods, and requires additional qualitative disclosures regarding the chief operating decision maker. The ASU is effective for SJW Group beginning with its annual financial statements for the year ending December 31, 2024. Early adoption is permitted. Retrospective SJW Group is currently evaluating the requirements of ASU 2023-07. ASU 2023-09 “Improvements to Income Tax Disclosures” The ASU amends certain income tax disclosure requirements, including adding requirements to present the reconciliation of income tax expense computed at the statutory rate to actual income tax expense using both percentages and amounts and providing a disaggregation of income taxes paid. Further, certain disclosures are eliminated, including the current requirement to disclose information on changes in unrecognized tax benefits in the next 12 months. The ASU is effective for SJW Group beginning with its annual financial statements for the year ending December 31, 2025. Early adoption is permitted. Prospective, with retrospective application also permitted. SJW Group is currently evaluating the requirements of ASU 2023-09.

General (Tables)

General (Tables)	9 Months Ended
	Sep. 30, 2024
Accounting Policies [Abstract]
Schedule of SJW Group's Revenue Components	SJW Group’s revenue components are as follows: Three months ended September 30, Nine months ended September 30, 2024 2023 2024 2023 Revenue from contracts with customers $ 216,677 211,716 $ 539,790 507,276 Alternative revenue programs, net 7,369 957 6,847 (2,638) Other balancing and memorandum accounts and regulatory mechanisms, net (1,432) (9,260) (1,019) (9,906) Rental income 2,449 1,430 5,001 4,293 $ 225,063 204,843 $ 550,619 499,025
Schedule of Nonutility Properties and Real Estate Investments	The major components of nonutility properties and real estate investments as of September 30, 2024 and December 31, 2023, are as follows: September 30, December 31, Land $ 915 4,137 Wholesale water supply assets — 8,465 Buildings and improvements 437 748 Subtotal 1,352 13,350 Less: accumulated depreciation and amortization 97 194 Total $ 1,255 13,156 December 31, Land $ 13,170 Buildings and improvements 44,950 Subtotal 58,120 Less: accumulated depreciation and amortization 17,270 Total $ 40,850

Regulatory Matters (Tables)

Regulatory Matters (Tables)	9 Months Ended
	Sep. 30, 2024
Regulated Operations [Abstract]
Schedule of Regulatory Assets, Net	Regulatory assets and liabilities are comprised of the following as of September 30, 2024 and December 31, 2023: September 30, 2024 December 31, 2023 Regulatory assets: Income tax temporary differences (a) $ 173,671 157,669 Unrecognized pensions and other postretirement benefits (b) 24,593 24,593 Business combinations debt premium (c) 12,948 14,855 Employee benefit costs (d) 5,433 9,815 Monterey Water Revenue Adjustment Mechanism (“MWRAM”) (e) 10,327 9,361 Customer Assistance Program (“CAP”) balancing account (f) 6,683 5,457 Catastrophic event memorandum accounts (“CEMA”) (g) 975 4,819 2022 general rate case interim memorandum account (h) 3,354 4,571 Revenue adjustment mechanisms (n) 2,528 — Water supply costs (i) — 583 Other (j) 13,478 8,463 Total regulatory assets 253,990 240,186 Less: current regulatory assets (k) 828 4,276 Total regulatory assets, less current portion $ 253,162 235,910 Regulatory liabilities: Cost of removal (l) 360,176 346,418 Future income tax benefits due to customers (m) 85,966 88,610 Unrecognized pensions and other postretirement benefits (b) 20,515 20,196 Revenue adjustment mechanisms (n) 1,770 5,536 Water supply costs (i) 3,648 — Other (o) 3,594 3,407 Total regulatory liabilities 475,669 464,167 Less: current regulatory liabilities (p) 1,770 3,059 Total regulatory liabilities, less current portion $ 473,899 461,108 ___________________________________ (a) Consists primarily of temporary income tax differences that are flowed through to customers, which will be recovered in future rates as these temporary differences reverse. The company expects to recover regulatory assets related to plant depreciation income tax temporary differences over the lives of the plant assets, which are between 4 to 100 years. (b) Represents actuarial losses and gains and prior service cost that have not yet been recognized as components of net periodic benefit cost for certain pension and other postretirement benefit plans. (c) Consists of debt fair value adjustments recognized through purchase accounting for the completed merger with CTWS in 2019. (d) Includes deferrals of pension and other postretirement benefit expense and cost of accrued benefits for vacation. (e) MWRAM is described in the following section. (f) Represents costs associated with SJWC’s CAP. (g) The California Public Utilities Commission (“CPUC”) has authorized water utilities to activate CEMA accounts in order to track savings and costs related to SJWC’s response to catastrophic events, which includes external labor and materials, increases in bad debt from suspension of shutoffs for non-payment, waived deposits and reconnection fees, and divergence from actual versus authorized usage. At December 31, 2023, the balance primarily relates to increased bad debt expenses associated with SJWC’s response to COVID-19. (h) Represents the difference between revenues collected in interim rates in effect as of January 1, 2022 and revenues that would result from rates authorized in SJWC’s 2022 general rate case retroactive to January 1, 2022. (i) Reflects primarily SJWC’s Full Cost Balancing Account which tracks differences in actual water supply costs compared to amounts assumed in base rates, including applicable changes and variations in costs and quantities that affect the overall mix of the water supply. (j) Other includes other balancing and memorandum accounts and regulatory mechanisms, deferred costs for certain information technology activities, asset retirement obligations, tank painting, well reconditioning and rate case expenses. (k) As of September 30, 2024, primarily relates to the current portion of CWC’s deferred well redevelopment and rate case costs. As of December 31, 2023, primarily relates to the current portion of MWRAM. (l) Represents amounts collected in rates from customers for estimated costs to retire assets at the end of their expected useful lives before the costs are incurred. (m) On December 22, 2017 the Tax Cuts and Jobs Act of 2017 (the "Tax Act”) was signed into law. The Tax Act included a reduction in the federal income tax rate from 35% to 21%. The rate reduction was effective on January 1, 2018 and resulted in a regulatory liability for the excess deferred income taxes. The benefit of amortization of excess deferred income taxes flows back to the customers under current normalization rules and agreed upon methods with the commissions. (n) Consists of Water Rate Adjustment mechanism (“WRA”) and Water Conservation Memorandum Account (“WCMA”),which are described in the following section. (o) Other includes other balancing and memorandum accounts, other regulatory mechanisms and accrued tank painting costs. (p) As of September 30, 2024 and December 31, 2023, primarily relates to the current portion of WRA.

Benefit Plans (Tables)

Benefit Plans (Tables)	9 Months Ended
	Sep. 30, 2024
Retirement Benefits [Abstract]
Schedule of Net Benefit Costs	The components of net periodic benefit costs for the defined benefit plans and other postretirement benefits for the three and nine months ended September 30, 2024 and 2023 are as follows: Pension Benefits Other Benefits Three months ended September 30, 2024 2023 2024 2023 Service cost $ 1,666 1,892 $ 166 160 Interest cost 3,613 3,557 295 317 Expected return on assets (4,463) (3,442) (267) (217) Amortization of actuarial (gain) loss (18) 554 (161) (87) Amortization of prior service cost 4 4 — — Total $ 802 2,565 $ 33 173 Pension Benefits Other Benefits Nine months ended September 30, 2024 2023 2024 2023 Service cost $ 4,997 5,676 $ 498 480 Interest cost 10,839 10,672 886 951 Expected return on assets (13,389) (11,580) (801) (651) Amortization of actuarial (gain) loss (53) 1,662 (483) (263) Amortization of prior service cost 11 11 — — Total $ 2,405 6,441 $ 100 517

Equity Plans (Tables)

Equity Plans (Tables)	9 Months Ended
	Sep. 30, 2024
Share-Based Payment Arrangement [Abstract]
Schedule of Compensation Costs Charged to Income and Proceeds from the Exercise of Any Restricted Stock and Similar Instruments that are Recorded to Additional Paid-In Capital and Common Stock, by Award Type	A summary of compensation costs charged to income, by award type, and proceeds from the ESPP, are presented below for the three and nine months ended September 30, 2024 and 2023: Three months ended September 30, Nine months ended September 30, 2024 2023 2024 2023 Compensation costs charged to income: ESPP $ 259 187 $ 454 378 Restricted stock and deferred restricted stock 1,307 1,051 3,925 3,198 Total compensation costs charged to income $ 1,566 1,238 $ 4,379 3,576 ESPP proceeds $ 1,087 1,061 $ 2,188 2,141

Segment and Non-Tariffed Busi_2

Segment and Non-Tariffed Business Reporting (Tables)	9 Months Ended
	Sep. 30, 2024
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	The following tables set forth information relating to SJW Group’s reportable segments and distribution of regulated and non-tariffed business activities within the reportable segments. Certain allocated assets, such as goodwill, revenue and expenses have been included in the reportable segment amounts. Other business activity of SJW Group not included in the reportable segments is included in the “All Other” category. For Three Months Ended September 30, 2024 Water Utility Services (1) Real Estate Services All Other (2) SJW Group Regulated Non-tariffed Non-tariffed Non-tariffed Regulated Non-tariffed Total Operating revenue $ 220,938 4,103 22 — 220,938 4,125 225,063 Operating expense 161,929 2,799 205 1,777 161,929 4,781 166,710 Operating income (loss) 59,009 1,304 (183) (1,777) 59,009 (656) 58,353 Net income (loss) 43,751 915 34 (6,048) 43,751 (5,099) 38,652 Depreciation and amortization 27,113 85 1 224 27,113 310 27,423 Interest on long-term debt and other interest expense 11,516 75 — 5,925 11,516 6,000 17,516 Provision (benefit) for income taxes 1,182 389 15 342 1,182 746 1,928 For Three Months Ended September 30, 2023 Water Utility Services (1) Real Estate Services All Other (2) SJW Group Regulated Non-tariffed Non-tariffed Non-tariffed Regulated Non-tariffed Total Operating revenue $ 199,537 3,876 1,430 — 199,537 5,306 204,843 Operating expense 144,102 2,337 691 1,107 144,102 4,135 148,237 Operating income (loss) 55,435 1,539 739 (1,107) 55,435 1,171 56,606 Net income (loss) 37,545 2,198 563 (4,084) 37,545 (1,323) 36,222 Depreciation and amortization 26,147 84 1 223 26,147 308 26,455 Interest on long-term debt and other interest expense 10,839 112 — 5,793 10,839 5,905 16,744 Provision (benefit) for income taxes 5,933 428 196 (1,996) 5,933 (1,372) 4,561 For Nine Months Ended September 30, 2024 Water Utility Services (1) Real Estate Services All Other (2) SJW Group Regulated Non-tariffed Non-tariffed Non-tariffed Regulated Non-tariffed Total Operating revenue $ 537,899 10,146 2,574 — 537,899 12,720 550,619 Operating expense 411,959 6,788 1,391 3,645 411,959 11,824 423,783 Operating income (loss) 125,940 3,358 1,183 (3,645) 125,940 896 126,836 Net income (loss) 82,307 2,145 617 (14,022) 82,307 (11,260) 71,047 Depreciation and amortization 83,231 255 3 670 83,231 928 84,159 Interest on long-term debt and other interest expense 35,095 520 — 17,779 35,095 18,299 53,394 Provision (benefit) for income taxes 10,203 1,008 213 (3,541) 10,203 (2,320) 7,883 For Nine Months Ended September 30, 2023 Water Utility Services (1) Real Estate Services All Other (2) SJW Group Regulated Non-tariffed Non-tariffed Non-tariffed Regulated Non-tariffed Total Operating revenue $ 485,334 9,398 4,293 — 485,334 13,691 499,025 Operating expense 375,647 5,540 2,251 2,645 375,647 10,436 386,083 Operating income (loss) 109,687 3,858 2,042 (2,645) 109,687 3,255 112,942 Net income (loss) 71,277 3,412 1,532 (10,183) 71,277 (5,239) 66,038 Depreciation and amortization 77,644 253 305 670 77,644 1,228 78,872 Interest on long-term debt and other interest expense 32,232 112 — 16,569 32,232 16,681 48,913 Provision (benefit) for income taxes 8,759 1,071 581 (6,284) 8,759 (4,632) 4,127 ____________________ (1) The “Water Utility Services” category for the three and nine months ended September 30, 2024 and 2023, includes the accounts of SJWC, CWC, TWC, MWC, and NEWUS on a stand-alone basis. (2) The “All Other” category for the three and nine months ended September 30, 2024 and 2023, includes the accounts of SJW Group, SJWNE LLC, CTWS and SJWTX Holdings, Inc. on a stand-alone basis. SJW Group’s assets by segment are as follows: September 30, 2024 December 31, 2023 Water Utility Services: Regulated $ 4,496,972 4,199,172 Non-tariffed 1,424 43,532 Total water utility services 4,498,396 4,242,704 Real Estate Services 849 44,222 All Other 53,057 58,141 Total assets $ 4,552,302 4,345,067 Regulated $ 4,496,972 4,199,172 Non-tariffed 55,330 145,895 Total assets $ 4,552,302 4,345,067

General - Narrative (Details)

General - Narrative (Details) $ in Thousands	1 Months Ended		3 Months Ended	9 Months Ended
	Jun. 30, 2024 USD ($)	Apr. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2024 USD ($) subsidiary	Aug. 14, 2023 well
Schedule of Investments [Line Items]
Number of subsidiaries | subsidiary				5
Gain (loss) on disposition of assets				$ (969)
Portion of proceeds from sale of productive assets, held in escrow			$ 2,801	$ 2,801
Number of wells acquired | well					8
Indefinite life water rights reclassified from other intangible assets to utility plant intangible assets			28,386
Indefinite life water rights reclassified from nonutility property to utility plant			$ 11,684
Warehouse Building
Schedule of Investments [Line Items]
Proceeds from sale of productive assets		$ 27,000
Gain (loss) on disposition of assets		$ 6,918
Office Building, Land, and Parking Lot
Schedule of Investments [Line Items]
Proceeds from sale of productive assets	$ 17,000
Gain (loss) on disposition of assets	$ (7,887)

General - Schedule of SJW Group

General - Schedule of SJW Group's Revenue Components (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accounting Policies [Abstract]
Revenue from contracts with customers	$ 216,677	$ 211,716	$ 539,790	$ 507,276
Alternative revenue programs, net	7,369	957	6,847	(2,638)
Other balancing and memorandum accounts and regulatory mechanisms, net	(1,432)	(9,260)	(1,019)	(9,906)
Rental income	2,449	1,430	5,001	4,293
Operating revenue	$ 225,063	$ 204,843	$ 550,619	$ 499,025

General - Schedule of Nonutilit

General - Schedule of Nonutility Properties and Real Estate Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Land	$ 915	$ 4,137
Wholesale water supply assets	0	8,465
Buildings and improvements	437	748
Nonutility properties and real estate investments	1,352	13,350
Less: accumulated depreciation and amortization	97	194
Net nonutility properties and real estate investments	$ 1,255	13,156
Tennessee Properties
Schedule of Investments [Line Items]
Land		13,170
Buildings and improvements		44,950
Nonutility properties and real estate investments		58,120
Less: accumulated depreciation and amortization		17,270
Net nonutility properties and real estate investments		$ 40,850

General - Fair Value Measuremen

General - Fair Value Measurement (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	$ 1,534,801	$ 1,394,412
Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	1,518,400	1,378,683
Fair Value, Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt, fair value	16,401	15,729
Fair Value, Inputs, Level 1 | Supplemental Employee Retirement Plan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of plan assets	$ 2,952	$ 2,833

General - Earnings per Share (D

General - Earnings per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive restricted common stock units excluded from computation of earnings per share (in shares)	485	1,826	5,289	12,524

General - Accounts Receivable (

General - Accounts Receivable (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2024	Sep. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reduction to its allowance for credit losses	$ 7,822
Regulatory Asset Impairment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reduction to its allowance for credit losses	3,960
General and Administrative Expense
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reduction to its allowance for credit losses	$ 3,862
Reduction in allowance for credit losses, net of tax		$ 2,782
Reduction in allowance for credit loss, per diluted share (in dollars per share)		$ 0.09

Regulatory Matters - Regulatory

Regulatory Matters - Regulatory Assets, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Regulatory assets:
Total regulatory assets	$ 253,990	$ 240,186
Less: current regulatory assets	828	4,276
Total regulatory assets, less current portion	253,162	235,910
Regulatory liabilities:
Total regulatory liabilities	475,669	464,167
Less: current regulatory liabilities	1,770	3,059
Total regulatory liabilities, less current portion	$ 473,899	461,108
Minimum
Regulatory liabilities:
Estimated service lives of assets	4 years
Maximum
Regulatory liabilities:
Estimated service lives of assets	100 years
Cost of removal
Regulatory liabilities:
Total regulatory liabilities	$ 360,176	346,418
Future income tax benefits due to customers
Regulatory liabilities:
Total regulatory liabilities	85,966	88,610
Unrecognized pensions and other postretirement benefits
Regulatory liabilities:
Total regulatory liabilities	20,515	20,196
Revenue adjustment mechanisms
Regulatory liabilities:
Total regulatory liabilities	1,770	5,536
Water supply costs
Regulatory liabilities:
Total regulatory liabilities	3,648	0
Other
Regulatory liabilities:
Total regulatory liabilities	3,594	3,407
Future income tax benefits due to customers
Regulatory assets:
Total regulatory assets	173,671	157,669
Unrecognized pensions and other postretirement benefits
Regulatory assets:
Total regulatory assets	24,593	24,593
Business combinations debt premium
Regulatory assets:
Total regulatory assets	12,948	14,855
Employee benefit costs
Regulatory assets:
Total regulatory assets	5,433	9,815
Monterey Water Revenue Adjustment Mechanism
Regulatory assets:
Total regulatory assets	10,327	9,361
Customer Assistance Program ("CAP") balancing account
Regulatory assets:
Total regulatory assets	6,683	5,457
Catastrophic event memorandum accounts ("CEMA")
Regulatory assets:
Total regulatory assets	975	4,819
2022 general rate case interim memorandum account
Regulatory assets:
Total regulatory assets	3,354	4,571
Revenue adjustment mechanisms
Regulatory assets:
Total regulatory assets	2,528	0
Water supply costs
Regulatory assets:
Total regulatory assets	0	583
Other
Regulatory assets:
Total regulatory assets	$ 13,478	$ 8,463

Regulatory Matters - Narrative

Regulatory Matters - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Regulated Operations [Abstract]
Authorized revenue, threshold percentage	2%
Regulatory assets, net not earning a return	$ 41,962	$ 43,141

Capitalization (Details)

Capitalization (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended	34 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2024	Dec. 31, 2023	Nov. 17, 2021
Subsidiary, Sale of Stock [Line Items]
Common stock, par value (in usd per share)	$ 0.001	$ 0.001	$ 0.001	$ 0.001
At The Market Offering
Subsidiary, Sale of Stock [Line Items]
Common stock, par value (in usd per share)					$ 0.001
Aggregate gross sales price (up to)					$ 240,000
Shares issued in offering (in shares)	535,345	1,119,975	3,124,632
Weighted average price per share (in usd per share)	$ 59.17	$ 57.70	$ 67.88
Net proceeds from stock offering	$ 31,007	$ 63,309	$ 207,307
Total equity distribution	$ 27,889	$ 27,889	$ 27,889

Lines of Credit and Long-Term_2

Lines of Credit and Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Jul. 31, 2024	Dec. 31, 2023	Nov. 15, 2023
Debt Instrument [Line Items]
Weighted-average interest rate on short-term	6.61%		6.48%
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Unused portion of line of credit	$ 256,765
Senior Notes | Connecticut Water Company | Series 2023 Notes
Debt Instrument [Line Items]
Aggregate principal amount				$ 25,000
Interest rate				6.46%
Senior Notes | Connecticut Water Company | Series 2024 Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 50,000
Interest rate		5.78%
Senior Notes | San Jose Water Company | Series Q Notes
Debt Instrument [Line Items]
Aggregate principal amount		$ 75,000
Interest rate		5.63%

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Provision (benefit) for income taxes	$ 1,928	$ 4,561	$ 7,883	$ 4,127
Effective consolidated income tax rate	5%	11%	10%	6%
Unrecognized tax benefits	$ 4,920		$ 4,920		$ 4,511

Commitment and Contingencies (D

Commitment and Contingencies (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Sep. 30, 2024	Dec. 31, 2024
Other Commitments [Line Items]
Service agreement, term of contract	12 years
Service agreement, renewal term	8 years
Annual investment rent	$ 1,800
Forecast
Other Commitments [Line Items]
Upfront concession fee		$ 22,100

Benefit Plans - Narrative (Deta

Benefit Plans - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Employer plan contributions	$ 2,258	$ 4,516
CTWS Employees
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase		1.50%

Benefit Plans - Schedule of Net

Benefit Plans - Schedule of Net Benefit Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,666	$ 1,892	$ 4,997	$ 5,676
Interest cost	3,613	3,557	10,839	10,672
Expected return on assets	(4,463)	(3,442)	(13,389)	(11,580)
Amortization of actuarial (gain) loss	(18)	554	(53)	1,662
Amortization of prior service cost	4	4	11	11
Total	802	2,565	2,405	6,441
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	166	160	498	480
Interest cost	295	317	886	951
Expected return on assets	(267)	(217)	(801)	(651)
Amortization of actuarial (gain) loss	(161)	(87)	(483)	(263)
Amortization of prior service cost	0	0	0	0
Total	$ 33	$ 173	$ 100	$ 517

Equity Plans - Narrative (Detai

Equity Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
ESPP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation costs	$ 135		$ 135
Restricted stock and deferred restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity instruments granted (in shares)	0	968	64,482	38,310
Grant date fair value of equity instruments granted (in usd per share)		$ 63.96	$ 56.70	$ 76.88
Unrecognized compensation costs	$ 6,739		$ 6,739
Recognition period for unrecognized compensation cost			1 year 9 months 7 days
Restricted stock and deferred restricted stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service-based restricted stock vesting period		1 year	1 year	1 year
Restricted stock and deferred restricted stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Service-based restricted stock vesting period		3 years	3 years	3 years
Restricted stock and deferred restricted stock | Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issuable upon exercise of incentive plan awards (in shares)	187,810		187,810
Remaining shares available for issuance (in shares)	1,038,040		1,038,040
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity instruments granted (in shares)	0	0	45,763	31,345
Grant date fair value of equity instruments granted (in usd per share)			$ 55.60	$ 80.05
Performance Shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target vesting percentage			0%
Performance Shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target vesting percentage			150%
Market-based RSU | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target vesting percentage			0%
Market-based RSU | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target vesting percentage			200%

Equity Plans - Schedule of Comp

Equity Plans - Schedule of Compensation Costs Charged to Income and Proceeds from the Exercise of Any Restricted Stock and Similar Instruments that are Recorded to Additional Paid-In Capital and Common Stock, by Award Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs charged to income:	$ 1,566	$ 1,238	$ 4,379	$ 3,576
Restricted stock and deferred restricted stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs charged to income:	1,307	1,051	3,925	3,198
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation costs charged to income:	259	187	454	378
ESPP proceeds	$ 1,087	$ 1,061	$ 2,188	$ 2,141

Segment and Non-Tariffed Busi_3

Segment and Non-Tariffed Business Reporting - Narrative (Details)	9 Months Ended
	Sep. 30, 2024 subsidiary
Segment Reporting [Abstract]
Number of subsidiaries	5

Segment and Non-Tariffed Busi_4

Segment and Non-Tariffed Business Reporting - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Operating revenue	$ 225,063			$ 204,843			$ 550,619	$ 499,025
Operating expense	166,710			148,237			423,783	386,083
Operating income (loss)	58,353			56,606			126,836	112,942
Net income (loss)	38,652	$ 20,696	$ 11,699	36,222	$ 18,286	$ 11,530	71,047	66,038
Depreciation and amortization	27,423			26,455			84,159	78,872
Interest on long-term debt and other interest expense	17,516			16,744			53,394	48,913
Provision (benefit) for income taxes	1,928			4,561			7,883	4,127
Total assets	4,552,302						4,552,302		$ 4,345,067
Water Utility Services
Segment Reporting Information [Line Items]
Total assets	4,498,396						4,498,396		4,242,704
Water Utility Services | Regulated
Segment Reporting Information [Line Items]
Operating revenue	220,938			199,537			537,899	485,334
Operating expense	161,929			144,102			411,959	375,647
Operating income (loss)	59,009			55,435			125,940	109,687
Net income (loss)	43,751			37,545			82,307	71,277
Depreciation and amortization	27,113			26,147			83,231	77,644
Interest on long-term debt and other interest expense	11,516			10,839			35,095	32,232
Provision (benefit) for income taxes	1,182			5,933			10,203	8,759
Total assets	4,496,972						4,496,972		4,199,172
Water Utility Services | Non-tariffed
Segment Reporting Information [Line Items]
Operating revenue	4,103			3,876			10,146	9,398
Operating expense	2,799			2,337			6,788	5,540
Operating income (loss)	1,304			1,539			3,358	3,858
Net income (loss)	915			2,198			2,145	3,412
Depreciation and amortization	85			84			255	253
Interest on long-term debt and other interest expense	75			112			520	112
Provision (benefit) for income taxes	389			428			1,008	1,071
Total assets	1,424						1,424		43,532
Real Estate Services | Non-tariffed
Segment Reporting Information [Line Items]
Operating revenue	22			1,430			2,574	4,293
Operating expense	205			691			1,391	2,251
Operating income (loss)	(183)			739			1,183	2,042
Net income (loss)	34			563			617	1,532
Depreciation and amortization	1			1			3	305
Interest on long-term debt and other interest expense	0			0			0	0
Provision (benefit) for income taxes	15			196			213	581
Total assets	849						849		44,222
All Other | Non-tariffed
Segment Reporting Information [Line Items]
Operating revenue	0			0			0	0
Operating expense	1,777			1,107			3,645	2,645
Operating income (loss)	(1,777)			(1,107)			(3,645)	(2,645)
Net income (loss)	(6,048)			(4,084)			(14,022)	(10,183)
Depreciation and amortization	224			223			670	670
Interest on long-term debt and other interest expense	5,925			5,793			17,779	16,569
Provision (benefit) for income taxes	342			(1,996)			(3,541)	(6,284)
Total assets	53,057						53,057		58,141
SJW Group | Regulated
Segment Reporting Information [Line Items]
Operating revenue	220,938			199,537			537,899	485,334
Operating expense	161,929			144,102			411,959	375,647
Operating income (loss)	59,009			55,435			125,940	109,687
Net income (loss)	43,751			37,545			82,307	71,277
Depreciation and amortization	27,113			26,147			83,231	77,644
Interest on long-term debt and other interest expense	11,516			10,839			35,095	32,232
Provision (benefit) for income taxes	1,182			5,933			10,203	8,759
Total assets	4,496,972						4,496,972		4,199,172
SJW Group | Non-tariffed
Segment Reporting Information [Line Items]
Operating revenue	4,125			5,306			12,720	13,691
Operating expense	4,781			4,135			11,824	10,436
Operating income (loss)	(656)			1,171			896	3,255
Net income (loss)	(5,099)			(1,323)			(11,260)	(5,239)
Depreciation and amortization	310			308			928	1,228
Interest on long-term debt and other interest expense	6,000			5,905			18,299	16,681
Provision (benefit) for income taxes	746			$ (1,372)			(2,320)	$ (4,632)
Total assets	$ 55,330						$ 55,330		$ 145,895

Acquisitions (Details)

Acquisitions (Details) $ in Thousands		9 Months Ended
	Aug. 14, 2023 USD ($) serviceConnection people	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)
Business Acquisition [Line Items]
Seller financing in asset acquisition, net of discount		$ 0	$ 15,400
KT Water Resource L. P.
Business Acquisition [Line Items]
Asset acquisition, consideration transferred before transaction costs	$ 39,891
Payment for asset acquisition	24,491
Seller financing in asset acquisition, net of discount	15,400
Asset acquisition, transaction cost	170
Asset acquisition, consideration transferred	40,061
Asset acquisition, other intangible asset	28,386
Asset acquisition, nonutility property	11,684
Asset acquisition, other current liabilities	9
Asset acquisition, post-closing production payment	$ 29,000
Asset acquisition, period of post-closing production payment	29 years
KT Water Development Ltd
Business Acquisition [Line Items]
Payments for business acquisition	$ 7,338
Texas Water | KT Water Development Ltd
Business Acquisition [Line Items]
Number of people served from acquisition | people	1,725
Texas Water | KT Water Development Ltd | Southern Comal County, Texas
Business Acquisition [Line Items]
Number of service connections from acquisition | serviceConnection	570