Exhibit 23
Consent of Independent Registered Public Accounting Firm
We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (File Nos. 333-87272, 333-78285 and 333-85559) of NSTAR of our report dated June 8, 2006 relating to the financial statements of the NSTAR Savings Plan, which appears in this Form 11-K.
/s/ VITALE, CATURANO & CO., LTD.
Boston, Massachusetts
June 8, 2006