New Jersey flood zone map and environmental check
New Jersey is one of the few states whose flood disclosure law covers commercial property. Since March 20, 2024, sellers and landlords of residential and commercial property must say whether it sits in a FEMA flood area and whether it has flooded. The state also publishes its known contaminated sites, which helps because its industrial history is long.
Check a New Jersey 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 Jersey
FEMA’s Flood Map Service Center has the effective flood map for every New Jersey address. The state also runs:
NJ Department of Environmental Protection
State flood indicator report by address, including the state's own flood elevation 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 Jersey
NJ Department of Environmental Protection
The state's list of sites with confirmed contamination, by town and street.
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 New Jersey sellers must tell you about flooding
New Jersey's 2023 flood disclosure law (S3110/A4783) requires sellers and landlords of residential and commercial property to disclose FEMA flood zone status and known flood damage, effective March 20, 2024.
What our report checks for a New Jersey property
- NJ dry cleaner sites
- 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)