Environmental Rules in Memphis, TN (2026)
10 verified environmental rules for Memphis, Tennessee, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
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 Stormwater Management Rules
Heavy RestrictionsErosion Control
Memphis requires erosion and sediment control plans for all construction sites disturbing one acre or more under the Stormwater Management Manual 3.0 and Ordinance No. 4538. Construction sites must install perimeter silt fencing, stabilized construction entrances, and sediment basins before grading begins. Disturbed areas must be stabilized within 14 days of final grading. TDEC also requires a Construction General Permit (CGP) with a Stormwater Pollution Prevention Plan.
Memphis Erosion Control Requirements
Heavy RestrictionsCoastal Development
Memphis is an inland city on the Mississippi River and has no coastal development regulations. Tennessee does not have a coastal zone management program since the state lacks ocean coastline. Development near the Mississippi River is governed by floodplain regulations rather than coastal development rules. The Army Corps of Engineers regulates activities within the river channel under Section 404 of the Clean Water Act.
Memphis Waterway & Shoreline Development
Few RestrictionsFlood Zones
Memphis has extensive FEMA-designated flood zones along the Mississippi River, Wolf River, Nonconnah Creek, and Loosahatchie River. The Unified Development Code (UDC) and Memphis City Ordinance No. 4538 regulate construction in Special Flood Hazard Areas (SFHAs). New construction in the 100-year floodplain must elevate the lowest floor at least one foot above base flood elevation. The Shelby County Zoning Atlas identifies flood zones for all parcels.
Memphis Flood Zone Regulations
Heavy RestrictionsGrading & Drainage
Memphis requires grading and drainage plans for development projects under the Stormwater Management Manual 3.0 and the Unified Development Code. Site grading must direct runoff away from neighboring properties and toward approved stormwater facilities. Projects disturbing one or more acres need a land disturbance permit with a grading plan showing existing and proposed contours. Fill material must be properly compacted and erosion controls maintained throughout grading operations.
Memphis Grading & Drainage Rules
Some RestrictionsVehicle Idling Restrictions
Memphis does not have a citywide commercial idling cap, but Shelby County Health Department air-quality rules and Tennessee diesel standards restrict prolonged unnecessary idling near schools and sensitive sites.
Memphis Vehicle Idling Limits
Few RestrictionsClimate Emergency Mobilization
Memphis adopted a Climate Action Plan in 2018 setting a goal to reduce greenhouse gas emissions 71% by 2050 across buildings, transportation, and waste sectors citywide.
Memphis Climate Action Plan Goals
Some RestrictionsSustainable Procurement
Memphis encourages city departments to prefer recycled-content paper, energy-efficient equipment, and lower-emission fleet vehicles through procurement guidelines tied to the 2018 Climate Action Plan.
Memphis Sustainable Purchasing Practices
Few RestrictionsCool Roof Requirements
Memphis has no mandatory cool-roof ordinance for private buildings, but city facilities and MLGW efficiency rebates encourage reflective roofing materials to lower cooling load and curb urban heat.
Memphis Cool Roof Pilot Programs
Few RestrictionsHeat Island Mitigation
Memphis 3.0 and the Climate Action Plan call for tree canopy expansion, cool roofs on city buildings, and green infrastructure to reduce summer urban heat in dense neighborhoods like South Memphis and Frayser.