New York flood zone map and environmental check
New York's flood risk runs from the coast and New York City to river valleys upstate. For contamination, the state's spill database is unusually deep: decades of reported petroleum and chemical spills, many at old gas stations and fuel oil tanks, searchable by address.
Check a New York property’s flood zone free
Type the address. See the FEMA flood zone and map, free. Add your email to see which buildings sit in the flood area.
Official flood maps for New York
FEMA’s Flood Map Service Center has the effective flood map for every New York address. The state also runs:
NY State Department of Environmental Conservation
The state's NFIP coordinator: map updates, regional floodplain contacts and state rules.
Map tools usually show the zone at the address pin. On a commercial lot, the buildings can sit in a different zone than the pin. Our free check shows which buildings are in the 1% and 0.2% annual-chance flood areas.
Contamination and tank records in New York
NY State Department of Environmental Conservation
State cleanup sites, brownfields, the spill incidents database and petroleum bulk storage tanks.
A listed site next door matters as much as one on your lot: leaks travel with groundwater. Look at what’s around the property, not only the address.
What our report checks for a New York property
- FEMA's National Flood Hazard Layer: the flood zone under each building, not just the pin
- FEMA flood insurance claims history for the area (OpenFEMA)
- USACE National Levee Database
- EPA lists: Superfund (NPL and delisted), SEMS, RCRA corrective action and hazardous waste handlers, brownfields (ACRES), PFAS layers
- EPA UST Finder for underground storage tanks and leaks
- EPA ECHO air permits that flag dry cleaners
- Aerial photos back through the decades (USGS, NAIP, Esri Wayback) and Sanborn fire insurance maps where the Library of Congress has them
Every source is marked checked, not found or not checked. A source we couldn’t reach is listed as a gap, never as a clean result. It is a desk screen, not a Phase I.
Questions buyers ask
Other states
Sources (checked 2026-11-10)