Oklahoma Stormwater-Municipalities regulations & environmental compliance analysis

Oklahoma Stormwater-Municipalities: What you need to know

Governing Law and Regulations

Oklahoma Pollutant Discharge Elimination System (OPDES) program 27A Oklahoma Statutes Annotated (OSA) 2-6-201 to 2-6-206 and Oklahoma Administrative Code (OAC) 252:606-1-1 to 252:606 Appendix F

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Oklahoma water quality standards: OAC 785:45-5-1 to 785:45-5-26

Regulatory Agencies

Oklahoma Department of Environmental Quality (DEQ)Water Quality Division

Oklahoma Corporation Commission (OCC)

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. Oklahoma is fully authorized to administer and enforce the National Pollutant Discharge Elimination System (NPDES) program (known as OPDES in Oklahoma) for regulating discharges, including for stormwater associated with municipal separate storm sewer systems (MS4s). The state follows the federal requirements for MS4 stormwater discharges. See the national section STORMWATER—MUNICIPALITIES for more information on the federal MS4 permitting requirements.

Administration and enforcement. The EPA-approved state OPDES program for stormwater discharges is administered and enforced by DEQ's Water Quality Division.

State Requirements


The DEQ issues a stormwater general permit for small MS4s. Copies of the NOI and NOT forms for the small MS4 general permit can be accessed in Forms in this section.

The DEQ has issued individual MS4 permits to the cities of Tulsa and Oklahoma City, which are the large and medium MS4s in the state.


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