| Cover | Oct. 18, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 18, 2021 |
| Entity File Number | 000-50773 |
| Entity Registrant Name | IIOT-OXYS, Inc. |
| Entity Central Index Key | 0001290658 |
| Entity Tax Identification Number | 56-2415252 |
| Entity Incorporation, State or Country Code | NV |
| Entity Address, Address Line One | 705 Cambridge Street |
| Entity Address, City or Town | Cambridge |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02141 |
| City Area Code | (401) |
| Local Phone Number | 307-3092 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
