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States / Wisconsin

Washington County, WI

The federal environmental record for Washington County (population 138,168): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.

1

Superfund NPL sites

6

federal cleanup sites

4

PFAS-detecting water systems

26

TRI facilities

12

open tank releases

Superfund NPL sites

SiteCityStatusListed
Omega Hills North LandfillGermantowndeleted09/21/1984

Drinking water: PFAS testing

Public water systems serving Washington 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
HARTFORD WATERWORKS, WI

WI2670110

PFOA: 6.8 ng/L

PFHxS: 6.1 ng/L

PFOS: 5.5 ng/L

above final limit
KEWASKUM WATERWORKS

WI2670112

PFOA: 15 ng/L

PFBS: 6.6 ng/L

above final limit
WEST BEND WATERWORKS

WI2670120

PFOA: 6.5 ng/L

PFBS: 3.9 ng/L

above final limit
SLINGER WATER UTILITY

WI2670116

PFPeA: 7 ng/L

PFHxS: 5.7 ng/L

PFHxA: 4.8 ng/L

detected

On a system with detections? Testing and treatment options

Facilities reporting toxic releases (2024)

26 facilities in Washington filed TRI reports for 2024, totalling 127k lb released. The 25 largest by volume:

FacilityCityTop chemicalsTotal released
STERLING WISCONSIN LLCGERMANTOWNMethanol, Toluene41k lb
REGAL WARE WEST BENDWEST BENDAluminum oxide (fibrous forms), Nickel33k lb
HAWK RESEARCH LABORATORIES LLCWEST BENDXylene (mixed isomers), Toluene20k lb
SERIGRAPH INCWEST BENDMixture13k lb
CUSTOM PAK PRODUCTS LLCGERMANTOWNXylene (mixed isomers), Ethylbenzene7k lb
BROAN-NUTONE LLCHARTFORDCertain glycol ethers6k lb
RESINLAB KITPACKERSGERMANTOWNNonylphenol, Diisocyanates3k lb
EH WOLF & SONS INC-SLINGER FACILITYSLINGERMethanol, Toluene2k lb
DSM FOOD SPECIALTIES USA INC.GERMANTOWNAmmonia, Nitrate compounds (water dissociable; reportable only when in aqueous solution)1k lb
BARTON SOLVENTS INC. WEST BENDWEST BENDToluene, Xylene (mixed isomers)854 lb
SCHREIBER FOODSWEST BENDNitrate compounds (water dissociable; reportable only when in aqueous solution)298 lb
METALCRAFT OF MAYVILLEWEST BENDManganese, Lead And Lead Compounds157 lb
SIGNICAST LLC HARTFORD MANUFACTURING COMPLEXHARTFORDChromium, Manganese153 lb
FT MANUFACTURING CORPWEST BENDChromium, Nickel40 lb
BOYD CORPALLENTONCopper, Lead13 lb
RHEOCAST COGERMANTOWNCopper12 lb
STEEL CRAFT CORP. OF WIHARTFORDManganese5 lb
MAYSTEEL LLCALLENTONChromium3 lb
MGSGERMANTOWN-0 lb
KERRY INGREDIENTSJACKSON-0 lb
BRADLEY CORPGERMANTOWNChromium, Nickel0 lb
WEASLER ENGINEERING INCKEWASKUM-0 lb
SYSTEMS LLCGERMANTOWN-0 lb
SUNLITE PLASTICSGERMANTOWN-0 lb
GEHL FOODS LLCGERMANTOWN-0 lb

Underground fuel tanks

EPA's UST Finder records 566 tank facilities in Washington: 284 tanks in service and 1,186 closed. 359 fuel releases are on record, of which 12 remain open. Open releases are cleanups that have not reached "no further action".

Radon

EPA maps Washington 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 - $39

All federal cleanup sites on file

The wider Superfund enterprise inventory (SEMS) for Washington, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.

  • A & W IRON AND METALKEWASKUM
  • NATIONWIDE RECYCLING LLCWEST BEND
  • NIPHOSSLINGER
  • PRAEFKE BRAKE & SUPPLY CORPWEST BEND
  • WASHINGTON COUNTY HIGHWAY W LANDFILLSTOWN OF WAYNE
  • WEST BEND PLATINGWEST BEND