Winnebago, 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 Winnebago in Illinois · Population: 283,289
TRI sites such as Azz Galvanizing - Rockford LLC; J&m Plating; Curtis Metal Finishing Co; SDWIS systems such as ROCKFORD; NORTH PARK PWD; LOVES PARK; NPL sites such as Acme Solvents Reclaiming, Inc. (Morristown Plant); Beloit Corp.; Interstate Pollution Control, Inc. anchor Winnebago, 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 Winnebago include LOVES PARK; ROCKTON; CHERRY VALLEY, while Azz Galvanizing - Rockford LLC leads reported TRI pounds among local Form R filers. AQS median AQI 43 / peak 119 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 Winnebago -- 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 Winnebago, IL: EPA TRI 2023 reporting year
Same facilities, both years
+27.3%
38 facilities that filed in 2022 and 2023
Whole inventory
+26.6%
416.3 thousand lb → 526.9 thousand lb, every facility that filed
Between the two reporting years, 3 facilities filed for the first time and 3 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Winnebago, IL's total reported releases rose from 414.0 thousand lb in 2022 to 526.9 thousand lb in 2023, based on EPA TRI filings.
- Winnebago, IL's off-site transfers rose from 348.8 thousand lb in 2022 to 472.2 thousand lb in 2023, based on EPA TRI filings.
- Winnebago, IL's air releases fell from 65.1 thousand lb in 2022 to 54.7 thousand lb in 2023, based on EPA TRI filings.
- Winnebago, IL's chemicals reported rose from 29 in 2022 to 30 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 | 249 (69%) | 109 | 3 | 119 |
| 2023 | 167 (46%) | 178 | 17 | 242 |
| 2022 | 237 (65%) | 126 | 0 | 97 |
| 2021 | 190 (53%) | 170 | 0 | 100 |
| 2020 | 205 (56%) | 160 | 1 | 101 |
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 (16)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| ROCKFORD | 147,051 | 0 |
| NORTH PARK PWD | 35,580 | 0 |
| LOVES PARK | 23,335 | 12 |
| ROCKTON | 7,685 | 2 |
| CHERRY VALLEY | 4,731 | 6 |
| WINNEBAGO | 2,940 | 0 |
| PECATONICA | 2,195 | 1 |
| DURAND | 1,427 | 4 |
| FOREST VIEW MHP | 650 | 0 |
| COLONA PARK LLC - FORMERLY KERSHAW MHP | 250 | 0 |
| LEGEND LAKES WATER ASSOCIATION | 250 | 0 |
| PRAIRIE ROAD PUMP CORPORATION | 150 | 1 |
| NORTHGATE ESTATES MHP | 100 | 1 |
| CLARKS MHP | 90 | 0 |
| BRADLEY HEIGHTS SUBDIVISION | 82 | 0 |
| PHIL-AIRE ESTATES MHP | 80 | 2 |
TRI Facilities (50)
Superfund Sites (5)
| Site Name | Status | HRS Score |
|---|---|---|
| Acme Solvents Reclaiming, Inc. (Morristown Plant) | NPL Site | 31.98 |
| Beloit Corp. | NPL Site | 52.08 |
| Interstate Pollution Control, Inc. | NPL Site | 46.01 |
| Pagel's Pit | NPL Site | 45.91 |
| Southeast Rockford Ground Water Contamination | NPL Site | 42.24 |
Cities in Winnebago (12)
Frequently Asked Questions
What is the environmental risk level in Winnebago, Illinois? ▼
Are there Superfund sites in Winnebago? ▼
How many toxic release facilities are in Winnebago? ▼
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Is the drinking water safe in Winnebago? ▼
What environmental agencies cover Winnebago? ▼
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.