McHenry County, IL
The federal environmental record for McHenry County (population 312,800): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
1
Superfund NPL sites
12
federal cleanup sites
6
PFAS-detecting water systems
25
TRI facilities
68
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Woodstock Municipal Landfill | Woodstock | on the NPL | 10/04/1989 |
Drinking water: PFAS testing
Public water systems serving McHenry 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 |
|---|---|---|
| Prairie Path Water Co. - Whispering Hills IL1115700 | PFPeA: 14 ng/L PFHxA: 13 ng/L PFBA: 8.7 ng/L | above final limit |
| CARY IL1110100 | PFPeA: 12 ng/L PFBA: 7.4 ng/L PFHxA: 6.9 ng/L | detected |
| CRYSTAL LAKE IL1110150 | PFBS: 4.6 ng/L PFPeA: 4.5 ng/L | detected |
| FOX RIVER GROVE IL1110200 | PFPeA: 5.6 ng/L PFBA: 5.2 ng/L PFHxS: 4.6 ng/L | detected |
| MCHENRY IL1110600 | PFBS: 3.9 ng/L | detected |
| MARENGO IL1110650 | PFBS: 11 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
25 facilities in McHenry filed TRI reports for 2024, totalling 76k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| CENTRAL WIRE INC | UNION | Nitrate compounds (water dissociable; reportable only when in aqueous solution), Nickel | 20k lb |
| HUNTSMAN POLYURETHANES | RINGWOOD | Diisocyanates, Ethylene glycol | 11k lb |
| ENGINEERED POLYMER SOLUTIONS INC. | MARENGO | Methyl methacrylate, Butyl acrylate | 10k lb |
| ADVANCED FLEXIBLE COMPOSITES INC | LAKE IN THE HILLS | Xylene (mixed isomers), Toluene | 9k lb |
| WAUCONDA TOOL & ENGINEERING CO INC | ALGONQUIN | 1-Bromopropane | 5k lb |
| WERNER CO. | CRYSTAL LAKE | Zinc compounds, Manganese | 4k lb |
| G & M MANUFACTURING CORP | CRYSTAL LAKE | Dichloromethane | 4k lb |
| GROVE PLATING CO INC. | FOX RIVER GROVE | Zinc compounds | 4k lb |
| VORTEQ COIL FINISHERS LLC | WOODSTOCK | Certain glycol ethers, Xylene (mixed isomers) | 3k lb |
| BOSTIK INC. | RINGWOOD | Toluene, Ethylene glycol | 2k lb |
| TC INDUSTRIES INC | CRYSTAL LAKE | Manganese | 2k lb |
| LEICA BIOSYSTEMS RICHMOND INC | RICHMOND | Formaldehyde | 1k lb |
| CHROMA COLOR CORP | MC HENRY | Zinc compounds, Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 436 lb |
| AMPAC FLEXIBLES LLC (PREVIOUSLY FLEXICON INC) | CARY | Toluene | 319 lb |
| JOHN CRANE INC | CRYSTAL LAKE | Polycyclic aromatic compounds | 208 lb |
| ARNTZEN CORP | WOODSTOCK | Manganese, Chromium | 113 lb |
| SCOT FORGE CO | SPRING GROVE | Zinc compounds, Chromium | 77 lb |
| DUREX INDUSTRIES | CARY | Chromium, Copper | 48 lb |
| MITSUBISHI LOGISNEXT AMERICAS | MARENGO | Copper, Nickel | 36 lb |
| MACLEAN-FOGG COMPONENT SOLUTIONS | RICHMOND | - | 0 lb |
| MAASS MIDWEST MANUFACTURING INC | HUNTLEY | - | 0 lb |
| CHARTER DURA BAR | WOODSTOCK | - | 0 lb |
| OZINGA READY-MIX CONCRETE - MCHENRY | MCHENRY | Lead | 0 lb |
| MATHEWS CO | CRYSTAL LAKE | - | 0 lb |
| OZINGA READY-MIX CONCRETE-MARENGO | MARENGO | Lead | 0 lb |
Underground fuel tanks
EPA's UST Finder records 536 tank facilities in McHenry: 349 tanks in service and 1,177 closed. 338 fuel releases are on record, of which 68 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps McHenry as Zone 2, moderate predicted indoor radon (2 to 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 McHenry, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ADAMS AUTOMOTIVE AND RADIATORMCHENRY
- BARTLETT MANUFACTURING COHARVARD
- FOX RIVER GROVE PUBLIC WELL #2FOX RIVER GROVE
- HARVARD UNION PACIFIC TRAIN DERAILMENTHARVARD
- HEBRON PLATINGHEBRON
- INVERSE INVESTMENTSMCHENRY
- MODINE MANUFACTURING COMC HENRY
- MORTON CHEMICAL COMPANYRINGWOOD
- SOUTH CALIFORNIA CHEMICALUNION
- WABASH TAPE COHUNTLEY
- WOODSTOCK DIE CAST INCWOODSTOCK
- WOODSTOCK MUNICIPAL LANDFILLWOODSTOCK