Will, IL
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against every other tracked county rather than against fixed national thresholds.
Environmental data for Will in Illinois · Population: 698,450
Will, IL is tracked across three EPA datasets covering 50 Toxics Release Inventory (TRI) facilities, 41 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 72/100 (High Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 15.6M lbs of reported toxic releases under EPCRA Section 313, while 14 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 44 and a peak AQI of 84 in 2024, with 67% of observed days rated "Good" (0–50).
All figures below draw directly from federal EPA records, TRI self-reported emissions, SDWIS compliance history, NPL Hazard Ranking System scores, and AQS daily AQI summaries, and are not adjusted, weighted, or forecast. A past violation or elevated score does not itself indicate current unsafe conditions; it documents the regulatory and disclosure history publicly filed with the U.S. Environmental Protection Agency through the most recent reporting cycle.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 245 (67%) | 120 | 0 | 84 |
| 2023 | 155 (42%) | 191 | 14 | 246 |
| 2022 | 193 (53%) | 170 | 2 | 101 |
| 2021 | 157 (43%) | 206 | 2 | 105 |
| 2020 | 183 (50%) | 176 | 3 | 156 |
Source: EPA Air Quality System (AQS) Annual AQI by County EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Illinois, see the EPA's AirNow.gov.
Water Systems (41)
| System | Population | Violations |
|---|---|---|
| JOLIET | 160,000 | 2 |
| NAPERVILLE | 156,406 | 0 |
| ROMEOVILLE | 50,458 | 0 |
| PLAINFIELD | 50,000 | 0 |
| NEW LENOX | 27,690 | 0 |
| FRANKFORT | 24,000 | 2 |
| LOCKPORT | 23,100 | 1 |
| CREST HILL | 21,169 | 3 |
| MOKENA | 19,887 | 0 |
| SHOREWOOD | 18,645 | 0 |
| CHANNAHON | 13,380 | 0 |
| MANHATTAN | 10,340 | 0 |
| CRETE | 8,275 | 1 |
| BRAIDWOOD | 6,194 | 0 |
| WILMINGTON | 5,624 | 2 |
| MONEE | 5,148 | 0 |
| BEECHER | 4,713 | 0 |
| ELWOOD | 2,229 | 1 |
| ROCKDALE | 2,012 | 0 |
| SOUTHEAST JOLIET SD | 2,000 | 1 |
| PHEASANT LAKE ESTATES MHP | 1,528 | 0 |
| CRYSTAL LAWNS ADDITION IMPROVEMENT ASSOC | 1,435 | 6 |
| BONNIE BRAE FOREST MANOR SNDST | 1,338 | 0 |
| EAST MORELAND WTR SERVICE ASSN | 1,320 | 1 |
| LOCKPORT HEIGHTS SD | 984 | 0 |
| GATEWAY MHP | 884 | 1 |
| LAKEWOOD SHORES IMPROVEMENT ASSOCIATION | 868 | 0 |
| INGALLS PARK SUBDIVISION | 744 | 0 |
| CHANNAHON EAST | 630 | 0 |
| COLLEGE VIEW SUBDIVISION | 570 | 0 |
| JOLIET INPATIENT TREATMENT CENTER | 486 | 0 |
| BALMORAL HEIGHTS SUBDIVISION | 400 | 0 |
| SUNNYLAND SUBDIVISION | 300 | 0 |
| MAPLE ACRES MHP | 260 | 10 |
| JOLIET TREATMENT CENTER | 217 | 0 |
| DIXIE ESTATES SUBDIVISION | 180 | 0 |
| CRISWELL COURT MHP | 94 | 1 |
| GARDEN STREET IMPROVEMENT ASSOCIATION | 54 | 0 |
| HIDDEN ACRES MOBILE PK 2 | 39 | 0 |
| HIDDEN ACRES MOBILE PK 1 | 32 | 1 |
| HIDDEN ACRES MOBILE PK 3 | 29 | 0 |
TRI Facilities (50)
Cities in Will (18)
Frequently Asked Questions
What is the environmental risk level in Will, Illinois? ▼
Are there Superfund sites in Will? ▼
How many toxic release facilities are in Will? ▼
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What environmental agencies cover Will? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.