Illinois has 45 Superfund sites: 3.4% of the US total of 1,316. That ranks #9 by count and #24 per person (0.35 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/illinois" width="100%" height="440" style="border:2px solid #111" loading="lazy" title="Illinois superfund sites map — InstaMaps"></iframe>Acme Solvents Reclaiming, Inc. (Morristown Plant) · Byron Salvage Yard · Cross Brothers Pail Recycling (Pembroke) · Galesburg/Koppers Co. · Johns-Manville Corp. · LaSalle Electric Utilities · Outboard Marine Corp. · Velsicol Chemical Corp. (Marshall Plant) · Wauconda Sand & Gravel · Kerr-McGee (Residential Areas) · Sangamo Electric Dump/Crab Orchard National Wildlife Refuge (USDOI) · NL Industries/Taracorp Lead Smelter
"Illinois has 45 Superfund sites, #9 in the US by count and #24 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.