Missouri has 33 Superfund sites: 2.5% of the US total of 1,316. That ranks #14 by count and #17 per person (0.53 per 100,000 residents) of 51.
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
Local blogs, news sites, parks pages: embed the live interactive map with one snippet. Attribution stays on, that's the whole deal.
<iframe src="https://get-instamaps.com/embed/rankings/superfund-sites/missouri" width="100%" height="440" style="border:2px solid #111" loading="lazy" title="Missouri superfund sites map — InstaMaps"></iframe>Valley Park TCE · Oronogo-Duenweg Mining Belt · Missouri Electric Works · Weldon Spring Quarry/Plant/Pits (USDOE/Army) · St. Louis Airport/Hazelwood Interim Storage/Futura Coatings Co. · Westlake Landfill · Big River Mine Tailings/St. Joe Minerals Corp. · Newton County Wells · Pools Prairie · Armour Road · Riverfront · Oak Grove Village Well
"Missouri has 33 Superfund sites, #14 in the US by count and #17 per person (EPA National Priorities List, September 2026, mapped by InstaMaps)." Free to quote with a link to this page. Population: US Census 2024 estimates.