Memphis operates under a Municipal Separate Storm Sewer System (MS4) permit regulated by the Tennessee Department of Environment and Conservation. Memphis City Ordinance No. 4538 and the Stormwater Management Manual 3.0 (effective February 2025) govern all new development and redevelopment. Projects disturbing one acre or more must obtain a land disturbance permit and implement stormwater best management practices. Post-construction stormwater controls must manage the first inch of rainfall on-site.
Memphis 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.
Memphis, TN
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Memphis, TN
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Memphis, TN
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See how Memphis's stormwater management rules stack up against other locations.
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