Oklahoma City, OK Environmental Rules: Stormwater Management (2026)
Key Facts
- Code Chapter
- OKC Municipal Code Ch. 51
- Permit Trigger
- 1+ acre land disturbance
- Plan Required
- SWP3 (Stormwater Pollution Prevention Plan)
- Enforcement
- OKC Stormwater Quality Division
- Illicit Discharge
- Prohibited under Ch. 51
Summary
Oklahoma City regulates stormwater under Chapter 51 (Stormwater Quality Protection) and Chapter 16 (Drainage and Flood Controls). The city holds an MS4 permit under the Oklahoma Pollutant Discharge Elimination System. Construction sites disturbing one acre or more must obtain both state NOI coverage and a city erosion control permit with an approved Stormwater Pollution Prevention Plan (SWP3).
§27A-2-6-205. Unlawful discharge - Permit requirements - Authority of Department.
A. Except as otherwise provided in subsection B of this section, it shall be unlawful for any facility, activity or entity regulated by the Department of Environmental Quality pursuant to the Oklahoma Pollutant Discharge Elimination System Act to discharge any pollutant into waters of the state or elsewhere without first obtaining a permit from the Executive Director.
B. The Environmental Quality Board shall promulgate rules which prescribe permit requirements applicable to discharges composed entirely of stormwater. The rules may require permits on a case-by- case basis, exempt categories of discharges, or provide a schedule for obtaining a permit. No later than the date that th
Full Breakdown
Oklahoma City enforces stormwater management regulations to prevent flooding and protect water quality. New construction and major renovations must include stormwater management plans. Impervious surface limits may apply in residential zones. Low-impact development techniques like rain gardens, permeable pavers, and bioswales are encouraged or required. Erosion and sediment control plans needed during construction. Post-construction stormwater facilities must be maintained by property owners. Municipal separate storm sewer system (MS4) permits govern city-wide discharge.
Frequently Asked Questions
Do I need a stormwater permit for construction in OKC?
Can I wash anything into a storm drain?
Sources & Official References
Other rules in Oklahoma City
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Stormwater Management in Nearby Cities
How other cities in this county handle stormwater management.