Dupage, IL
A PlainEnviro-computed score from reported facility/violation counts, not an official EPA rating, health forecast, or population-adjusted rate. See methodology.
Environmental data for Dupage in Illinois · Population: 927,263
Dupage, IL is tracked across three EPA datasets covering 50 Toxics Release Inventory (TRI) facilities, 50 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 70/100 (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 1.8M lbs of reported toxic releases under EPCRA Section 313, while 10 water systems carry an active health-based violation in the SDWIS record. EPA Air Quality System monitors logged a median AQI of 45 and a peak AQI of 97 in 2024, with 63% 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 | 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 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 | Population | 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 | 24,233 | 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 | 1 |
| DU PAGE WATER COMMISSION | 1 | 0 |
TRI Facilities (50)
Cities in Dupage (18)
Frequently Asked Questions
What is the environmental risk level in Dupage, Illinois? ▼
Are there Superfund sites in Dupage? ▼
How many toxic release facilities are in Dupage? ▼
What is the air quality in Dupage? ▼
Is the drinking water safe in Dupage? ▼
What environmental agencies cover Dupage? ▼
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.