Exhibit 23
Consent of Independent Registered Public Accounting Firm
As independent registered public accountants, we consent to the incorporation by reference of our report dated June 28, 2010 relating to the financial statements and supplemental schedule of the NSTAR Savings Plan as of December 31, 2009 and 2008 and for the year ended December 31, 2009 included in this Form 11-K into NSTAR's previously filed Registration Statements on Form S-8 (File Nos. 333-87272 and 333-160263).
/s/ Caturano and Company, P.C.
Boston, Massachusetts
June 28, 2010