Dupage, 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.
Environmental data for Dupage in Illinois · Population: 927,263
TRI sites such as Swd Inc.; Morgan Ohare Inc.; U.S. Doe Argonne National Laboratory; SDWIS systems such as WHEATON; DOWNERS GROVE; ELMHURST; NPL sites such as DuPage County Landfill/Blackwell Forest; Kerr-McGee (Kress Creek/West Branch of DuPage River); Kerr-McGee (Reed-Keppler Park) anchor Dupage, IL's EPA extract. Derived burden score 95/100 (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 Dupage include BARTLETT; YORK TOWNSHIP WATER SYSTEM; SUBURBAN APARTMENTS (DE KALB UNIV DVL), while Swd Inc. leads reported TRI pounds among local Form R filers. AQS median AQI 45 / peak 97 in 2024.
Burden score 95/100 (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 Dupage -- 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 Dupage, IL: EPA TRI 2023 reporting year
Same facilities, both years
+11.3%
74 facilities that filed in 2022 and 2023
Whole inventory
+9.1%
330.7 thousand lb → 360.9 thousand lb, every facility that filed
Between the two reporting years, 4 facilities filed for the first time and 5 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Dupage, IL's total reported releases rose from 322.9 thousand lb in 2022 to 359.4 thousand lb in 2023, based on EPA TRI filings.
- Dupage, IL's off-site transfers rose from 205.9 thousand lb in 2022 to 255.4 thousand lb in 2023, based on EPA TRI filings.
- Dupage, IL's air releases fell from 116.9 thousand lb in 2022 to 104.0 thousand lb in 2023, based on EPA TRI filings.
- Dupage, IL's chemicals reported fell from 49 in 2022 to 48 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 | 230 (63%) | 136 | 0 | 97 |
| 2023 | 146 (40%) | 202 | 11 | 234 |
| 2022 | 199 (55%) | 165 | 1 | 129 |
| 2021 | 179 (49%) | 184 | 2 | 105 |
| 2020 | 213 (58%) | 149 | 3 | 154 |
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 (50)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| WHEATON | 53,970 | 0 |
| DOWNERS GROVE | 49,425 | 0 |
| ELMHURST | 45,000 | 0 |
| LOMBARD | 44,476 | 0 |
| BARTLETT | 41,500 | 5 |
| CAROL STREAM | 39,854 | 0 |
| ADDISON | 38,017 | 0 |
| HANOVER PARK | 37,470 | 0 |
| WOODRIDGE | 33,566 | 0 |
| GLENDALE HEIGHTS | 33,176 | 0 |
| GLEN ELLYN | 28,850 | 0 |
| WEST CHICAGO | 25,166 | 0 |
| LISLE | 24,223 | 0 |
| ROSELLE | 22,897 | 0 |
| VILLA PARK | 22,263 | 0 |
| BLOOMINGDALE | 22,018 | 0 |
| DARIEN | 21,751 | 0 |
| BENSENVILLE | 18,537 | 0 |
| HINSDALE | 17,900 | 0 |
| WOOD DALE | 14,012 | 0 |
| WARRENVILLE | 12,350 | 0 |
| BURR RIDGE | 11,192 | 0 |
| WINFIELD | 9,835 | 0 |
| ITASCA | 9,506 | 0 |
| OAK BROOK | 9,400 | 0 |
| WILLOWBROOK | 9,000 | 0 |
| CLARENDON HILLS | 8,702 | 0 |
| SOUTHEAST REGIONAL WATER FACILITY | 6,940 | 0 |
| STONE PARK | 4,576 | 0 |
| GLEN ELLYN HEIGHTS SUBDIVISION | 1,931 | 0 |
| STEEPLE RUN SBDV | 1,931 | 0 |
| NORTHFIELD ESTATES | 1,620 | 0 |
| OAKBROOK TERRACE | 1,440 | 0 |
| YORK TOWNSHIP WATER SYSTEM | 1,423 | 1 |
| SUBURBAN APARTMENTS (DE KALB UNIV DVL) | 1,050 | 1 |
| LIBERTY PARK HOMEOWNERS ASSOCIATION | 950 | 2 |
| NORTH REGIONAL WATER FAC | 770 | 2 |
| FORREST BROOKE MHP | 491 | 4 |
| HOBSON VALLEY WATER SYSTEM | 400 | 0 |
| WHISPERING PINES MHP | 400 | 1 |
| KNOLLS WATER COOPERATIVE | 400 | 0 |
| SILVER SHORES MOBILE HOME PARK | 360 | 0 |
| COUNTRYSIDE ESTATES MHP | 158 | 1 |
| WEEKI WACHEE NORTH TP | 150 | 0 |
| CHALET DU PAW PAW CONDOMINIUMS | 95 | 0 |
| POLO DR AND SADDLE RD SUBDIVISION | 93 | 1 |
| CLIFTWOOD MOBILE HOME PARK | 54 | 0 |
| SIX OAKS MHP | 48 | 0 |
| WILLOW CREEK CROSSING | 34 | 2 |
| DU PAGE WATER COMMISSION | 1 | 0 |
TRI Facilities (50)
Superfund Sites (6)
| Site Name | Status | HRS Score |
|---|---|---|
| DuPage County Landfill/Blackwell Forest | Deleted NPL Site | 35.57 |
| Kerr-McGee (Kress Creek/West Branch of DuPage River) | NPL Site | 39.05 |
| Kerr-McGee (Reed-Keppler Park) | Deleted NPL Site | 39.51 |
| Kerr-McGee (Residential Areas) | NPL Site | 38.15 |
| Kerr-McGee (Sewage Treatment Plant) | Deleted NPL Site | 35.20 |
| Lenz Oil Service, Inc. | NPL Site | 42.33 |
Cities in Dupage (31)
Frequently Asked Questions
What is the environmental risk level in Dupage, Illinois? ▼
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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.