Will, IL
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Will in Illinois · Population: 698,450
TRI sites such as Exxonmobil Oil Corp Joliet Refinery; Laraway Recycling & Disposal Facility; Stepan Co Millsdale Road; SDWIS systems such as NAPERVILLE; ROMEOVILLE; PLAINFIELD; NPL sites such as Amoco Chemicals (Joliet Landfill); Joliet Army Ammunition Plant (Load-Assembly-Packing Area); Joliet Army Ammunition Plant (Manufacturing Area) anchor Will, IL's EPA extract. Derived burden score 87/100 (High Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Will include FRANKFORT; LOCKPORT; CREST HILL, while Exxonmobil Oil Corp Joliet Refinery leads reported TRI pounds among local Form R filers. AQS median AQI 44 / peak 84 in 2024.
Burden score 87/100 (High Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Will -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Will, IL: EPA TRI 2023 reporting year
Same facilities, both years
-25.3%
56 facilities that filed in 2022 and 2023
Whole inventory
-25.4%
3.7 million lb → 2.7 million lb, every facility that filed
Between the two reporting years, 7 facilities filed for the first time and 4 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Will, IL's total reported releases fell from 3.7 million lb in 2022 to 2.7 million lb in 2023, based on EPA TRI filings.
- Will, IL's land releases fell from 608.8 thousand lb in 2022 to 300.6 thousand lb in 2023, based on EPA TRI filings.
- Will, IL's off-site transfers fell from 443.6 thousand lb in 2022 to 298.9 thousand lb in 2023, based on EPA TRI filings.
- Will, IL's air releases fell from 2.0 million lb in 2022 to 1.4 million lb in 2023, based on EPA TRI filings.
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 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 (39)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| 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 | 5,700 | 2 |
| MONEE | 5,148 | 0 |
| BEECHER | 4,713 | 0 |
| ELWOOD | 2,229 | 1 |
| ROCKDALE | 2,012 | 0 |
| 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)
Superfund Sites (3)
| Site Name | Status | HRS Score |
|---|---|---|
| Amoco Chemicals (Joliet Landfill) | NPL Site | 39.44 |
| Joliet Army Ammunition Plant (Load-Assembly-Packing Area) | NPL Site | 35.23 |
| Joliet Army Ammunition Plant (Manufacturing Area) | NPL Site | 32.08 |
Cities in Will (23)
Frequently Asked Questions
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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.