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States / Illinois

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

SiteCityStatusListed
Woodstock Municipal LandfillWoodstockon the NPL10/04/1989

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.

SystemHighest resultsReading
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.

FacilityCityTop chemicalsTotal released
CENTRAL WIRE INCUNIONNitrate compounds (water dissociable; reportable only when in aqueous solution), Nickel20k lb
HUNTSMAN POLYURETHANESRINGWOODDiisocyanates, Ethylene glycol11k lb
ENGINEERED POLYMER SOLUTIONS INC.MARENGOMethyl methacrylate, Butyl acrylate10k lb
ADVANCED FLEXIBLE COMPOSITES INCLAKE IN THE HILLSXylene (mixed isomers), Toluene9k lb
WAUCONDA TOOL & ENGINEERING CO INCALGONQUIN1-Bromopropane5k lb
WERNER CO.CRYSTAL LAKEZinc compounds, Manganese4k lb
G & M MANUFACTURING CORPCRYSTAL LAKEDichloromethane4k lb
GROVE PLATING CO INC.FOX RIVER GROVEZinc compounds4k lb
VORTEQ COIL FINISHERS LLCWOODSTOCKCertain glycol ethers, Xylene (mixed isomers)3k lb
BOSTIK INC.RINGWOODToluene, Ethylene glycol2k lb
TC INDUSTRIES INCCRYSTAL LAKEManganese2k lb
LEICA BIOSYSTEMS RICHMOND INCRICHMONDFormaldehyde1k lb
CHROMA COLOR CORPMC HENRYZinc compounds, Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)436 lb
AMPAC FLEXIBLES LLC (PREVIOUSLY FLEXICON INC)CARYToluene319 lb
JOHN CRANE INCCRYSTAL LAKEPolycyclic aromatic compounds208 lb
ARNTZEN CORPWOODSTOCKManganese, Chromium113 lb
SCOT FORGE COSPRING GROVEZinc compounds, Chromium77 lb
DUREX INDUSTRIESCARYChromium, Copper48 lb
MITSUBISHI LOGISNEXT AMERICASMARENGOCopper, Nickel36 lb
MACLEAN-FOGG COMPONENT SOLUTIONSRICHMOND-0 lb
MAASS MIDWEST MANUFACTURING INCHUNTLEY-0 lb
CHARTER DURA BARWOODSTOCK-0 lb
OZINGA READY-MIX CONCRETE - MCHENRYMCHENRYLead0 lb
MATHEWS COCRYSTAL LAKE-0 lb
OZINGA READY-MIX CONCRETE-MARENGOMARENGOLead0 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 - $39

All 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