Every Superfund site on the EPA’s National Priorities List: the country’s worst toxic waste sites. 1,316 in all, counted by state. Free to cite, embed and download.
Interactive map · EPA National Priorities List · click a pin for details.
Source: EPA National Priorities List, September 2026. Every National Priorities List site in the 50 states and DC, at the EPA’s coordinates. Sites in the territories are left out.
Licence: U.S. government data: no copyright, free to reuse
| # | State | Locations |
|---|---|---|
| 1 | New Jersey | 115 |
| 2 | California | 97 |
| 3 | Pennsylvania | 91 |
| 4 | New York | 82 |
| 5 | Michigan | 66 |
| 6 | Texas | 55 |
| 7 | Florida | 50 |
| 8 | Washington | 47 |
| 9 | Illinois | 45 |
| 10 | Indiana | 40 |
| 11 | North Carolina | 38 |
| 12 | Ohio | 37 |
| 13 | Wisconsin | 36 |
| 14 | Missouri | 33 |
| 15 | Massachusetts | 32 |
| 16 | Virginia | 29 |
| 17 | South Carolina | 28 |
| 18 | Minnesota | 25 |
| 19 | Maryland | 22 |
| 20 | New Hampshire | 21 |
| 21 | Colorado | 20 |
| 22 | Tennessee | 19 |
| 23 | Montana | 18 |
| 24 | Nebraska | 18 |
| 25 | Delaware | 17 |
| 26 | Georgia | 16 |
| 27 | New Mexico | 16 |
| 28 | Louisiana | 15 |
| 29 | Oregon | 15 |
| 30 | Kansas | 14 |
| 31 | Connecticut | 13 |
| 32 | Iowa | 13 |
| 33 | Alabama | 12 |
| 34 | Rhode Island | 12 |
| 35 | Utah | 12 |
| 36 | Vermont | 11 |
| 37 | Arizona | 10 |
| 38 | Maine | 10 |
| 39 | West Virginia | 10 |
| 40 | Arkansas | 9 |
| 41 | Mississippi | 9 |
| 42 | Kentucky | 9 |
| 43 | Oklahoma | 9 |
| 44 | Alaska | 6 |
| 45 | Idaho | 6 |
| 46 | Hawaii | 3 |
| 47 | South Dakota | 2 |
| 48 | Washington DC | 1 |
| 49 | Nevada | 1 |
| 50 | Wyoming | 1 |
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1,316, from EPA National Priorities List (September 2026). Every National Priorities List site in the 50 states and DC, at the EPA’s coordinates. Sites in the territories are left out.
NJ (115), CA (97), PA (91). The 50-state ranking, by count and per person, is at get-instamaps.com/rankings/superfund-sites.
Yes. Cite "EPA National Priorities List, mapped by InstaMaps" with a link to this page. Every state has an embeddable map and a CSV download. Licence: U.S. government data: no copyright, free to reuse