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).
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.
Failure to implement stormwater plan: stop-work order. Illicit discharge to storm drains: fines $500 to $10,000. Maintenance failures: notice and fines after non-compliance.
Oklahoma City, OK
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