Oklahoma Department of Environmental Quality (DEQ) Water Quality Division Industrial Pretreatment Program
U.S. Environmental Protection Agency (EPA) Region 6
See ADDRESSES & CONTACTS for addresses and telephone numbers.
See national section for basic information and federal regulations.
Comparison: State vs. Federal
• Rules. The state is authorized by EPA to administer the National Pollutant Discharge Elimination System (NPDES) permit program, including the NPDES pretreatment program, known in Oklahoma as OPDES. The state has adopted by reference the federal pretreatment standards under Section 307 of the Clean Water Act (CWA) and 40 CFR 405 through 40 CFR 471. See ...