TRI Facilities
1,145
EPCRA Section 313 reporters
2023 EPA TRI data 1,145 facilities 1,783 water systems
Illinois Environmental Profile
According to the U.S. Environmental Protection Agency's 2023 Toxics Release Inventory, Safe Drinking Water Information System, and Superfund National Priorities List, this is Illinois's (IL) full public environmental-compliance record - toxic releases, drinking-water systems, and Superfund sites in one place.
IL regulatory profile by statute
Violation/site counts mapped to the EPA statutes this portal tracks
- CWA · NPDES
Clean Water Act, NPDES (water-system health violations)
642 records
- RCRA · Subtitle C 56
RCRA Subtitle C (Superfund-site proxy)
56 records
What this shows Counts are mapped to statute as a structural proxy and reflect reported activity, not toxicity-weighted or population-adjusted risk. Clean Air Act (Title V) permit data is not currently ingested by this portal, so air-permit compliance is not shown here.
Water Systems
1,783
SDWIS regulated
Superfund Sites
56
46 active NPL
Total Releases
337.8M lbs
TRI cumulative disclosure
Compliance Snapshot - IL
Sites with no recorded health violations 78.1%
Sites with at least one open violation 21.9%
Illinois consolidates three federal EPA datasets into one statewide environmental profile: 1,145 Toxics Release Inventory (TRI) facilities reporting under EPCRA Section 313, 1,783 community water systems regulated under the Safe Drinking Water Act, and 56 sites on the Superfund National Priorities List.
TRI facilities in IL have cumulatively disclosed 337.8M lbs of toxic chemical releases, while SDWIS records show 2,825 total violations across the state's regulated water systems, of which 642 systems carry an active health-based violation (MCL exceedance or treatment-technique failure). Activity clusters in counties such as Cook, Dupage, Lake, which account for the highest combined facility, water-system, and Superfund presence.
Every figure reflects the public regulatory record as filed with the U.S. Environmental Protection Agency and is not weighted for toxicity, geographic footprint, or population exposure. A state can rank high in any individual metric because of industrial history, naturally occurring contaminants in source water, or simply the number of reporting facilities, not because current residents face unsafe conditions. Drill into any county or water system below for the full disclosure record.
What does this state's environmental record show?
TRI Facilities
1,145
Water Systems
1,783
Superfund Sites
56
Total Violations
2,825
Total Releases
337.8M lbs
Health Violations
642
water systems
Largest Polluters
View all →| # | Facility | Total Releases |
|---|---|---|
| 1 | Prairie State Generating Co | 37.9M lbs |
| 2 | Wieland Metals Inc | 26.7M lbs |
| 3 | Adm Decatur Complex | 21.9M lbs |
| 4 | Peoria Disposal Co #1 | 17.0M lbs |
| 5 | Viscofan USA Inc | 14.9M lbs |
| 6 | Wood River Refinery | 13.5M lbs |
| 7 | Jbs/swift Pork Co | 13.0M lbs |
| 8 | Tyson Fresh Meats Inc - Joslin Il | 12.2M lbs |
| 9 | U.S. Steel Granite City Works | 9.7M lbs |
| 10 | Sterling Steel Co LLC | 9.6M lbs |
| 11 | East Dubuque Nitrogen Fertilizers LLC | 6.8M lbs |
| 12 | Exxonmobil Oil Corp Joliet Refinery | 6.2M lbs |
| 13 | Cleveland-Cliffs Riverdale LLC | 5.4M lbs |
| 14 | Envirite of Illinois Inc | 4.9M lbs |
| 15 | Quincy Oilseeds Complex | 4.9M lbs |
| 16 | Carus LLC Lasalle Site | 4.4M lbs |
| 17 | A Finkl & Sons Co DBA Finkl Steel - Chicago | 4.3M lbs |
| 18 | Keystone Steel & Wire Co D/b/a Liberty Steel & Wire Peoria | 4.2M lbs |
| 19 | Edwards Power Station | 4.0M lbs |
| 20 | Ingredion Inc Argo Plant | 3.9M lbs |
Water Quality
Systems with Health Violations
| Water System | Population | Violations |
|---|---|---|
| DONNELLSON | 213 | 65 |
| BUDA | 482 | 63 |
| LYNWOOD 3RD ADDITION | 100 | 59 |
| GENESEO HICKORY HILLS HOA | 83 | 53 |
| SHANNON | 801 | 52 |
| LAND AND WTR ASSN | 83 | 46 |
| DANVERS | 1,183 | 43 |
| MAEYSTOWN | 340 | 43 |
| CARLOCK | 562 | 42 |
| GREENFIELD | 1,480 | 40 |
| VERMONT | 738 | 38 |
| FOUNTAIN VALLEY MHP | 375 | 30 |
| COMPTON | 279 | 29 |
| SECOR | 351 | 29 |
| NEW SALEM PWD | 451 | 28 |
| CHENOA | 1,785 | 26 |
| CHRISMAN | 1,200 | 26 |
| APPLE CREEK WATER COOP | 968 | 24 |
| PINCKNEYVILLE | 5,804 | 23 |
| BEECHER CITY | 500 | 22 |
Cities with Water Issues
Antioch
Pop: -
Cary
Pop: -
Fox River Grove
Pop: -
Glenview
Pop: -
Grayslake
Pop: -
Harvard
Pop: -
Lake Bluff
Pop: -
Mchenry
Pop: -
Morton Grove
Pop: -
Mundelein
Pop: -
Vernon Hills
Pop: -
Northbrook
Pop: -
North Chicago
Pop: -
Palatine
Pop: -
Lincolnshire
Pop: -
Skokie
Pop: -
Waukegan
Pop: -
Wheeling
Pop: -
Woodstock
Pop: -
Elgin
Pop: -
Superfund Sites (56)
Counties (104 total)
| County | Facilities |
|---|---|
| Cook | 350 |
| Dupage | 95 |
| Lake | 43 |
| Will | 73 |
| Madison | 25 |
| Kane | 57 |
| Winnebago | 53 |
| Mchenry | 32 |
| Lasalle | 25 |
| Rock Island | 18 |
| Kankakee | 17 |
| St. Clair | 27 |
| Tazewell | 17 |
| Sangamon | 3 |
| Vermilion | 10 |
| Williamson | 9 |
| Champaign | 14 |
| Henry | 5 |
| Peoria | 17 |
| Mclean | 6 |
Showing top 20 counties by environmental activity. Illinois has 104 counties total.
Largest Cities
Antioch
Pop: -
2 facilities · 2 water systems
Arlington Heights
Pop: -
4 facilities · 2 water systems
Elk Grove Village
Pop: -
35 facilities · 2 water systems
Rolling Meadows
Pop: -
2 facilities · 1 water systems
Crystal Lake
Pop: -
6 facilities · 1 water systems
Cary
Pop: -
3 facilities · 1 water systems
Des Plaines
Pop: -
5 facilities · 2 water systems
Fox River Grove
Pop: -
1 facilities · 2 water systems
Glenview
Pop: -
1 facilities · 2 water systems
Grayslake
Pop: -
2 facilities · 3 water systems
Gurnee
Pop: -
3 facilities · 1 water systems
Harvard
Pop: -
1 facilities · 1 water systems
Lake Bluff
Pop: -
5 facilities · 3 water systems
Lake Zurich
Pop: -
4 facilities · 3 water systems
Libertyville
Pop: -
1 facilities · 14 water systems
Mc Henry
Pop: -
1 facilities · 0 water systems
Mchenry
Pop: -
2 facilities · 18 water systems
Morton Grove
Pop: -
5 facilities · 1 water systems
Mount Prospect
Pop: -
1 facilities · 1 water systems
Mundelein
Pop: -
3 facilities · 6 water systems
Frequently Asked Questions
How many polluting facilities are in Illinois? ▼
Illinois has 1,145 facilities that report to the EPA Toxic Release Inventory (TRI). These facilities have collectively reported 337.8M lbs in total toxic chemical releases. TRI data is self-reported annually by facilities that manufacture, process, or use listed toxic chemicals above threshold amounts.
Does Illinois have Superfund sites? ▼
Yes, Illinois has 56 sites on the EPA Superfund National Priorities List (NPL). Superfund sites are contaminated locations identified for long-term cleanup under the EPA Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
Is the water safe in Illinois? ▼
Illinois has 1,783 EPA-regulated water systems. 642 water systems have reported health-based violations (MCL exceedances). A past violation does not necessarily mean water is currently unsafe. For current water quality, contact your local water utility. Source: EPA SDWIS.
What environmental data is available for Illinois? ▼
PlainEnviro provides three categories of EPA environmental data for Illinois: Toxic Release Inventory (TRI) data covering 1,145 industrial facilities, Safe Drinking Water Information System (SDWIS) data for 1,783 water systems, and Superfund National Priorities List (NPL) data for 56 contaminated sites.
How does Illinois compare to other states environmentally? ▼
Illinois has 1,145 TRI facilities with 337.8M lbs in total releases, 56 Superfund sites, and 2,825 water system violations on record. State-level environmental comparisons depend on many factors including industrial activity, population, and geographic size. Source: EPA TRI, SDWIS, and Superfund NPL databases.
Explore More Data for Illinois
TRI Facilities in Illinois →
Every toxic-release facility reporting in the state, ranked by volume
Drinking Water Systems in Illinois →
Community water systems and their violation records
Air Quality in Illinois →
County-level AQI from EPA monitoring stations
Compare states by burden →
EJ screening scores for every U.S. county
State environmental rankings →
How states compare on releases, water and Superfund
Browse all states →
Environmental profiles for every U.S. state
About This Data
This page aggregates environmental data from three EPA programs for Illinois: the Toxic Release Inventory (TRI) for industrial chemical releases, the Safe Drinking Water Information System (SDWIS) for water quality, and the Superfund National Priorities List (NPL) for hazardous waste cleanup sites.
PlainEnviro presents this data without advocacy framing. Numbers reflect reported data and may not capture all environmental activity. For specific health or environmental concerns, contact your state environmental agency.
What to do with Illinois's data
Use this state profile as a starting point, then drill into the specific dataset that matters to you.
- Check the 1,145 TRI facilities reporting in Illinois for the largest reported releases near a specific county. View facilities
- 642 water systems in the state have a recorded health-based violation, check if yours is one of them. Check water systems
- See how Illinois compares to other states on releases, water violations, and Superfund sites. State rankings
Reported data reflects what facilities and agencies disclose to the EPA; it is not a complete measure of environmental risk or a substitute for local guidance.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from U.S. EPA environmental datasets. See our methodology for details. Retrieved and formatted by PlainEnviro Editorial
According to the U.S. Environmental Protection Agency, this state profile is drawn from PlainEnviro's database of more than 25,000 EPA-tracked facilities, the Safe Drinking Water Information System, and the Superfund National Priorities List, compiled since federal reporting began under the Emergency Planning and Community Right-to-Know Act in October 1986; see our methodology for full source citations and refresh cadence.
Every figure on PlainEnviro is rendered directly from EPA environmental compliance data, no number is typed in by an editor. State environmental figures are computed directly from EPA data. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.