EX-23 9 nstarexhibit23a.txt NSTAR EXHIBIT 23 CONSENT Exhibit 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statement on Form S-8 (No. 333-85559) of NSTAR of our report dated January 31, 2002, except as to Note D(2) for which the date is March 22, 2002, relating to the financial statements and the financial statement schedule, which appear in this Form 10-K. /s/ PRICEWATERHOUSECOOPERS LLP PricewaterhouseCoopers LLP Boston, Massachusetts January 31, 2002