Winnebago County, IL
The federal environmental record for Winnebago County (population 280,922): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
5
Superfund NPL sites
25
federal cleanup sites
4
PFAS-detecting water systems
45
TRI facilities
89
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Acme Solvents Reclaiming, Inc. (Morristown Plant) | Morristown | on the NPL | 09/08/1983 |
| Beloit Corp. | Rockton | on the NPL | 08/30/1990 |
| Interstate Pollution Control, Inc. | Rockford | on the NPL | 03/31/1989 |
| Pagel's Pit | Rockford | on the NPL | 06/10/1986 |
| Southeast Rockford Ground Water Contamination | Rockford | on the NPL | 03/31/1989 |
Drinking water: PFAS testing
Public water systems serving Winnebago with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| NORTH PARK PWD IL2015500 | PFHxS: 18.2 ng/L PFOS: 7.3 ng/L PFBA: 7 ng/L | above final limit |
| ROCKFORD, IL IL2010300 | PFHxS: 6.6 ng/L PFPeA: 4.4 ng/L | detected |
| ROCKTON IL2010350 | PFHxS: 12 ng/L | detected |
| IL AMERICAN-SOUTH BELOIT IL2010450 | PFBS: 3.7 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
45 facilities in Winnebago filed TRI reports for 2024, totalling 642k lb released. The 25 largest by volume:
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| J&M PLATING | ROCKFORD | Zinc compounds, Chromium compounds (except for chromite ore mined in the Transvaal Region) | 206k lb |
| AZZ GALVANIZING - ROCKFORD LLC | ROCKFORD | Zinc compounds, Lead | 181k lb |
| GUNITE CORP | ROCKFORD | Manganese, Lead | 104k lb |
| CHEM PROCESSING INC. | ROCKFORD | Trichloroethylene, Nitric acid | 55k lb |
| CURTIS METAL FINISHING CO | MACHESNEY PARK | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Zinc compounds | 22k lb |
| V-ROD USA INC DBA FIBERGLASS INNOVATIONS | ROCKFORD | Styrene | 17k lb |
| SHERWIN-WILLIAMS CO | ROCKFORD | Triglycidyl isocyanurate | 12k lb |
| ROCKNEL FASTENER INC. | ROCKFORD | Zinc compounds, Methanol | 10k lb |
| TAYLOR CO | ROCKTON | Chromium, Nickel | 9k lb |
| DIAMOND HEAT TREAT LLC | ROCKFORD | Ammonia | 7k lb |
| DFA DAIRY BRANDS FLUID LLC DBA KEMPS CULTURED | ROCKFORD | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nitric acid | 4k lb |
| GLEASON CUTTING TOOLS CORP | LOVES PARK | Cobalt | 4k lb |
| J. L. CLARK LLC | ROCKFORD | Certain glycol ethers, Xylene (mixed isomers) | 2k lb |
| K & J FINISHING | ROCKFORD | Zinc compounds | 2k lb |
| SHERWIN-WILLIAMS CO | ROCKFORD | Ethylene glycol | 1k lb |
| ROCKFORD HEAT TREATERS | ROCKFORD | Ammonia | 1k lb |
| TOP DIE CASTING CO | SOUTH BELOIT | Copper, Lead | 1k lb |
| VIKING CHEMICAL CO | ROCKFORD | Ammonia, Methanol | 669 lb |
| RUST-OLEUM CORP | ROCKFORD | 1,2,4-Trimethylbenzene | 619 lb |
| FOREST CITY TECHNOLOGIES - ROCKFORD PLANT | ROCKFORD | Toluene | 571 lb |
| PRAIRIE FARMS-ROCKFORD | ROCKFORD | Peracetic acid, Certain glycol ethers | 131 lb |
| VIKING CHEMICAL CO. | ROCKFORD | Ammonia, Methanol | 126 lb |
| ESTWING MANUFACTURING CO. INC | ROCKFORD | Diisononyl Phthalates (DINP) | 125 lb |
| WOODWARD INC. | LOVES PARK | Chromium | 43 lb |
| ARNTZEN CORP | ROCKFORD | Manganese, Copper | 23 lb |
Underground fuel tanks
EPA's UST Finder records 884 tank facilities in Winnebago: 566 tanks in service and 2,062 closed. 499 fuel releases are on record, of which 89 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Winnebago as Zone 1, the highest predicted indoor radon levels (over 4 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39All federal cleanup sites on file
The wider Superfund enterprise inventory (SEMS) for Winnebago, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ACME SOLVENT COMPANYROCKFORD
- AMEROCK CORPROCKFORD
- BARRETTS MHP PUBLIC WELLSROCKFORD
- BROWNING-FERRIS IND INCLOVES PARK
- CHEMTOOLROCKTON
- CHEMTOOLROCKTON
- ESSEX WIRE - ROCKFORDROCKFORD
- EVERGREEN MANOR GROUND WATER CONTAMINATIONWINNEBAGO
- ILLINOIS CABINET COMPANYROCKFORD
- INTERSTATE POLLUTION CONTROL, INC.ROCKFORD
- KANEY TRANSPORTATIONROCKFORD
- NELSON KNITTINGROCKFORD
- PAGEL'S PITROCKFORD
- ROCKFORD AMERICAN PLATINGROCKFORD
- ROCKFORD RESIDENTIAL MERCURYROCKFORD
- ROCKFORD SAND & GRAVELROCKFORD
- SIX OAKS MOBILE HOME PARKPECATONICA
- SMITH OIL (AKA: PREMIUM OIL)ROCKFORD
- SOPER AVENUE GROUNDWATER SITEROCKFORD
- SOUTHEAST ROCKFORD GROUND WATER CONTAMINATIONROCKFORD
- SPARKLE CLEANERSROCKFORD
- VICKERMAN'S PRODUCTS SITESOUTH BELOIT
- WARNER ELECTRIC BRAKE & CLUTCH CO.ROSCOE
- WILLOW LANE CYANIDE SITESOUTH BELOIT
- Y NOT USED TIRESROCKFORD