Monroe County, WI
The federal environmental record for Monroe County (population 46,151): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
4
Superfund NPL sites
5
federal cleanup sites
1
PFAS-detecting water systems
8
TRI facilities
8
open tank releases
Superfund NPL sites
| Site | City | Status | Listed |
|---|---|---|---|
| Northern Engraving Co. | Sparta | deleted | 09/21/1984 |
| Tomah Armory | Tomah | deleted | 07/22/1987 |
| Tomah Fairgrounds | Tomah | deleted | 07/22/1987 |
| Tomah Municipal Sanitary Landfill | Tomah | on the NPL | 03/31/1989 |
Drinking water: PFAS testing
Public water systems serving Monroe 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 |
|---|---|---|
| TOMAH WATERWORKS WI6420254 | PFHxS: 5.7 ng/L PFPeA: 5.1 ng/L PFHxA: 3.9 ng/L | detected |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
8 facilities in Monroe filed TRI reports for 2024, totalling 56k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| U.S. ARMY FORT MCCOY RANGE FACILITY | FORT MCCOY | Copper, Lead And Lead Compounds | 54k lb |
| NECAL LLC | SPARTA | Toluene | 2k lb |
| HARTLAND LUBRICANTS & CHEMICALS-SPARTA | SPARTA | Methanol | 164 lb |
| NORTHERN ENGRAVING CORP | SPARTA | Lead | 4 lb |
| CARDINAL GLASS | TOMAH | - | 0 lb |
| MARS PETCARE US INC. | TOMAH | - | 0 lb |
| FOREMOST FARMS USA | SPARTA | - | 0 lb |
| TORO CO | TOMAH | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 352 tank facilities in Monroe: 147 tanks in service and 723 closed. 173 fuel releases are on record, of which 8 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Monroe 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 Monroe, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- NORTHERN ENGRAVING CORPSPARTA
- TOMAH ARMORYTOMAH
- TOMAH FAIRGROUNDSTOMAH
- TOMAH MUNICIPAL SANITARY LANDFILLTOMAH
- US ARMY FORT MCCOY MILITARY RESERVATIONSPARTA