Oklahoma Effluent Limitations regulations & environmental compliance analysis

Oklahoma Effluent Limitations: What you need to know

Governing Law and Regulations

Oklahoma Pollutant Discharge Elimination System (OPDES) permit program: 27A Oklahoma Statutes Annotated 2-6-202

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Oklahoma Water Quality Standards: Oklahoma Administrative Code (OAC) 785:45-1-1 to 785:45-5-29 and Appendices A.1 to H

Regulatory Agencies

Oklahoma Department of Environmental Quality (DEQ) Water Quality Division

Oklahoma Water Resources Board

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Oklahoma has adopted by reference the federal effluent limitations. If DEQ determines that the federal effluent limitations are inapplicable, the limitations will be determined on a case-by-case basis. See the national section EFFLUENT LIMITATIONS for more information on federal effluent limitations.

Administration and enforcement. DEQ's Water Quality Division administers and enforces the state's water quality program. The Division is responsible for including effluent limitations in facility permits and enforcing these requirements.

State Requirements


For information on obtaining variances from water-quality-related effluent limitations, see the state section WASTEWATER VARIANCES. In addition, the state section NPDES PERMIT provides an overview of the state wastewater discharge permit requirements and effluent trading.


OAC 785:45-1-1 to 785:45-5-29

The Oklahoma water quality standards establish water quality benchmarks and provide the basis for the development of water quality-based pollution control programs, including NPDES permits.

Identification and protection of beneficial uses are vital to water quality standards ...

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