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Superfund Sites in the United States
Hazardous waste sites on EPA's National Priorities List, with cleanup status, contaminants found and the media affected, such as groundwater and soil. 1,839 Superfund sites · Data as of 10/21/2026
- Superfund Sites in the U.S.
- 1,839
- As of 10/21/2026
- Most in one state
- New Jersey
- 153 Superfund sites
- Most common type
- Final NPL Site
- 1,337 Superfund sites
- States and territories
- 56
- With at least one Superfund site
Choose a state
Darker states have more Superfund sites. Select a state for its full list by city and county.
Types of Superfund sites
Nationwide, open locations
- Final NPL Site1,337
- Deleted NPL Site466
- Proposed NPL Site37
Frequently asked questions
- How many Superfund sites are in the U.S.?
- Our data lists 1,839 Superfund sites across all 50 states, D.C. and U.S. territories, as of 10/21/2026.
- Which state has the most Superfund sites?
- New Jersey has the most with 153, followed by Pennsylvania (127), New York (122), California (116).
- Where does this Superfund site data come from?
- It comes from official public data published by U.S. government agencies. Each page lists its source and the date it was last updated.