Peoria, 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 Peoria in Illinois · Population: 179,831
Peoria, IL is tracked across three EPA datasets covering 17 Toxics Release Inventory (TRI) facilities, 17 Safe Drinking Water Act systems, and 0 Superfund National Priorities List sites. Together these generate an environmental burden score of 57/100 (Moderate Risk), calibrated against national distributions for facility density, chemical release volume, Superfund concentration, and water-system health violations.
Industrial disclosures inside the county total 27.0M lbs of reported toxic releases under EPCRA Section 313, while 6 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 100 in 2024, with 69% 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 | 236 (69%) | 108 | 0 | 100 |
| 2023 | 187 (55%) | 131 | 21 | 151 |
| 2022 | 181 (57%) | 138 | 0 | 100 |
| 2021 | 181 (50%) | 179 | 1 | 101 |
| 2020 | 247 (68%) | 116 | 1 | 115 |
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 (17)
| System | Population | Violations |
|---|---|---|
| CHILLICOTHE | 5,996 | 0 |
| PEORIA HEIGHTS | 5,908 | 0 |
| PLEASANT VALLEY PWD | 3,783 | 1 |
| T-L RURAL WATER DISTRICT | 2,665 | 1 |
| ELMWOOD | 2,058 | 0 |
| LIMESTONE-WALTERS PWD | 2,023 | 1 |
| PRINCEVILLE | 1,901 | 0 |
| DUNLAP | 1,603 | 0 |
| HANNA CITY | 1,253 | 0 |
| BRIMFIELD | 856 | 0 |
| MAPLETON | 261 | 2 |
| KINGSTON MINES | 259 | 1 |
| FOX CREEK FARMS WATER COMPANY | 203 | 0 |
| FAWN HILLS SUBDIVISION | 183 | 0 |
| JUBILEE WATER COMPANY, INC. | 78 | 0 |
| SANTA FE ESTATES WATER ASSOCIATION | 68 | 2 |
| BUFFALO HOLLOW FARMS WATER ASSOC | 45 | 0 |
TRI Facilities (17)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Peoria Disposal Co #1 | 17.0M lbs |
| 2 | Keystone Steel & Wire Co D/b/a Liberty Steel & Wire Peoria | 4.2M lbs |
| 3 | Edwards Power Station | 4.0M lbs |
| 4 | Caterpillar Inc Mapleton Plant | 873.9K lbs |
| 5 | Evonik Corp | 376.7K lbs |
| 6 | Arxada LLC | 169.0K lbs |
| 7 | Lanxess Corp | 111.5K lbs |
| 8 | Biourja Renewables LLC | 102.3K lbs |
| 9 | Komatsu America Corp | 51.3K lbs |
| 10 | Azz Galvanizing Services-Peoria | 25.0K lbs |
| 11 | Prairie Farms Dairy Inc | 6.3K lbs |
| 12 | Ingredion | 695 lbs |
| 13 | Cast Technologies Inc | 544 lbs |
| 14 | Tms International LLC | 52 lbs |
| 15 | US Dod Usaf Peoria Il Ang | 44 lbs |
| 16 | Vcna Prairie LLC - Yard 1028 | 0 lbs |
| 17 | Chillicothe Metal Co Inc | 0 lbs |
Cities in Peoria (4)
Frequently Asked Questions
What is the environmental risk level in Peoria, Illinois? ▼
Are there Superfund sites in Peoria? ▼
How many toxic release facilities are in Peoria? ▼
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Is the drinking water safe in Peoria? ▼
What environmental agencies cover Peoria? ▼
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.