Site Plain EPA Superfund sites near you, in plain language

What's on the EPA priority list near your home?

Data: EPA National Priorities List · Distance to boundary polygon, not centroid
EPA site boundaries loaded October 11, 2026

Approximately 23 million people live within 1 mile of a Superfund site, roughly 7% of the U.S. population. Source: EPA, Population Surrounding 1,881 Superfund Sites, updated July 2023. Covers final, deleted and proposed National Priorities List sites and Superfund Alternative Agreement sites as of fiscal year 2022, with 2017-2021 American Community Survey population.

19.4 million Americans live within 1 mile of an active Superfund site. Source: Site Plain's own analysis, March 2026. Method: 2020 Census block populations within 1 mile of the 1,328 active (final) National Priorities List site boundaries in EPA's boundary file. How Site Plain works

357 congressional districts, counting DC and territorial delegate districts, contain at least one active Superfund site. Source: Site Plain's own analysis, March 2026. Method: the same site boundaries overlaid on Census Bureau maps of 118th Congress districts.

Use it for

  • Finding Superfund sites near any address

    Enter a home address and see every active EPA National Priorities List site within 3 miles, ordered by distance to the actual boundary polygon.

  • Understanding EPA exposure status in plain English

    Each result shows whether EPA has determined human exposure is under control at that site, with the official exposure pathway description when available.

  • Checking before you buy, rent, or move

    A plain-English summary of publicly available federal data. No EPA login, no expert knowledge needed.

How it works

From address to official site record in three steps.

  1. Enter an address

    Geocoded via U.S. Census Geocoder with Nominatim fallback.

  2. Find sites within 3 miles

    PostGIS spatial query against EPA NPL boundary polygons. Distance is to the boundary, not to a centroid.

  3. See the federal record

    Human exposure status, exposure pathway description, and a direct link to the EPA site profile.

Trust and limits

Built from public federal data. Distance is not exposure.

Proximity to a Superfund site boundary does not mean your property is contaminated. EPA boundaries show the cleanup area, not the full extent of contamination. Groundwater plumes can extend beyond site boundaries. This tool is not affiliated with or endorsed by EPA.