8 county-level rules, plus city-specific rules for 3 cities in Suffolk County, New York.
Verified from official government sources
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.
NYSDEC 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...
Suffolk County erosion control is governed by NY SPDES SWPPP requirements, Coastal Erosion Hazard Area Act (NY ECL Article 34), and town Chapter 84 (Brookhaven) and similar. Bluff, dune, and beach construction requires NYSDEC Tidal Wetlands and CEHA permits.
Suffolk County coastline along Long Island Sound, Peconic Bays, and the Atlantic Ocean is regulated under New York State coastal erosion and tidal wetlands laws, with overlay permitting from the Suffolk County Department of Health Services for nearshore work.
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.
FEMA 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...
Suffolk County grading and drainage controlled by town land disturbance permits and Suffolk County Pine Barrens Protection Act. Central Pine Barrens Core Preservation Area is largely off-limits to development. Compatible Growth Area requires hydrology review.
Suffolk County drivers are subject to New York State idling rules under 6 NYCRR Part 217, generally limiting non-essential idling of heavy-duty diesel vehicles to five minutes, with stricter local school-zone enforcement around Suffolk school districts.
Suffolk County has no countywide gas leaf blower ban, but several East End villages and towns including Southampton Village, East Hampton Village, and Sag Harbor restrict gas-powered blowers seasonally to address noise and air quality concerns.
Suffolk County adopted a Climate Action Plan and joined New York State Climate Smart Communities, committing to greenhouse-gas reduction, sea-level-rise adaptation, and aquifer protection consistent with the New York Climate Leadership and Community Protection Act.
3 cities in Suffolk County have their own environmental rules rules. Each link goes to that city's dedicated page with code citations.
See every category we cover for Suffolk County — parking, noise, fences, fires, animals, pools, and more.
Suffolk County Ordinance Hub →