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Last Modified on Mar 13, 2026

Department of Environmental Quality
707 N Robinson
Oklahoma City, OK, 73102

Mailing Address:
Department of Environmental Quality
P.O.Box 1677
Oklahoma City, OK, 73101-1677

Main DEQ Phone Numbers:
Phone: 405-702-0100
Fax: 405-702-7102

Business Hours
Monday-Friday 8:00 a.m. to 4:30 p.m. (except State holidays)

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