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Superfund Sites Map: Every EPA Cleanup Site

Where the EPA's most contaminated sites are and which are still being cleaned up.

The map shows 1,822 Superfund sites. New Jersey has the most (153), then Pennsylvania (126) and New York (122).

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1,822Superfund sites on the map
New Jerseyhas the most (153)
52of the 50 states, DC and Puerto Rico have at least one
Superfund cleanup sites on the Map the Block map of the United StatesOpen the live map →

☣️Sites by status

Final1,321
Deleted465
Proposed36

🧪States with the most Superfund sites

New Jersey153
Pennsylvania126
New York122
California113
Michigan89
Florida81
Texas70
Washington66
Illinois56
Indiana53

🔎About this data

Sites on EPA's National Priorities List (final) or proposed for it, where EPA is managing a long-term cleanup. Being listed means EPA is handling the cleanup; it doesn't by itself mean people are exposed today. Each dot is the centre of EPA's mapped site boundary.

Source: U.S. EPA, Superfund site boundaries and NPL status (October 2026)

Coverage: Nationwide (incl. Puerto Rico and territories)

How it was checked: 1,321 final sites mapped = 98% of the 1,343 EPA lists on its NPL summary page (August 2026); 36 proposed vs EPA's 37. 99.5% of dots fall inside the state EPA lists for the site.

⬇️Download this data

Free sample

The first 25 rows of the full file, with all 11 columns, so you can see exactly what you get.

Sample CSV
Free lookups

A free key gives you 1,000 calls a month: look up any county, state or address and get every figure on this page.

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The full file

All 1,822 rows as CSV or GeoJSON, refreshed when the map updates. Included with the Data API from $19 a month (commercial use from $79).

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Dataset superfund · full file at /api/v1/bulk/superfund.csv with your key · see the data terms.

💬Questions and answers

How many Superfund sites are there in the United States?

The map shows 1,822 Superfund sites. New Jersey has the most (153), then Pennsylvania (126) and New York (122).

Where does this data come from?

U.S. EPA, Superfund site boundaries and NPL status (October 2026). Coverage: Nationwide (incl. Puerto Rico and territories).

Is the map free to use?

Yes. Map the Block is free, with no ads or paywall. You may quote figures with credit to Map the Block (maptheblock.com); for bulk or commercial use there is a Data API.

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Numbers computed from the live map data on October 18, 2026. Free to quote with credit to “Map the Block (maptheblock.com)”; see reuse terms.