Exhibit 23.1 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our reports dated June 17, 2004 relating to the financial statements and financial statement schedule, which appear in Casella Waste Systems, Inc.'s Annual Report on Form 10-K for the year ended April 30, 2004. We also consent to the reference to us under the heading "Experts" in such Registration Statement. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Boston, MA December 8, 2004