Environmental Rules in Suffolk County, NY (2026)
2 county-level rules, plus city-specific rules for 3 cities in Suffolk County, New York.
Verified from official government sources
Stormwater Management
Suffolk County is covered by NY SPDES MS4 general permit. All disturbances over 1 acre require SWPPP; Peconic Estuary and South Shore Estuary watershed projects trigger enhanced phosphorus controls. Suffolk County Article 6 regulates sanitary density to protect groundwater.
Environmental: Stormwater
Heavy RestrictionsNYSDEC Stormwater - SPDES General Permits
The USEPA and New York State Department of Environmental Conservation (NYSDEC) are increasing their attention in several ways. There are three State Pollutant Discharge Elimination System (SPDES) general permits required for activities associated stormwater discharges. The Multi-Sector General Permit for Stormwater Discharges Associated with Industrial Activities (MSGP) addresses stormwater run...
Flood Zones
Suffolk County has extensive FEMA Special Flood Hazard Areas along Atlantic coast, Long Island Sound, Great South Bay, Peconic Bays, and Shinnecock Bay. New construction in VE and AE zones must elevate to BFE + 2 ft freeboard. Superstorm Sandy prompted enhanced elevation requirements countywide.
Environmental: Flood Zones
Heavy RestrictionsFEMA Flood Map Service Center (MSC) - National Flood Insurance Program
FEMA Flood Map Service Center: Welcome! Looking for a Flood Map? Enter an address, a place, or longitude/latitude coordinates: Looking for more than just a current flood map? Visit Search All Products to access the full range of flood risk products for your community. About Flood Map Service Center The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard informatio...
Environmental Rules by City in Suffolk County
3 cities in Suffolk County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
All Suffolk County ordinances
See every category we cover for Suffolk County: parking, noise, fences, fires, animals, pools, and more.
Suffolk County Ordinance Hub →