Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-245722 on Form S-3 and Registration Statement No. 333-238092 on Form S-8 of our report dated March 10, 2022, relating to the consolidated financial statements of Global Water Resources, Inc. and subsidiaries, appearing in this Annual Report on Form 10-K for the year ended December 31, 2021.

/s/ DELOITTE & TOUCHE LLP

Phoenix, Arizona

March 10, 2022