Jefferson County, WI
The federal environmental record for Jefferson County (population 85,743): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
9
federal cleanup sites
1
PFAS-detecting water systems
18
TRI facilities
14
open tank releases
Drinking water: PFAS testing
Public water systems serving Jefferson 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 |
|---|---|---|
| PALMYRA WATERWORKS WI1280112 | PFOS: 6.2 ng/L PFHxS: 3.2 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
18 facilities in Jefferson filed TRI reports for 2024, totalling 523k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| FISHER BARTON BLADES | WATERTOWN | Sodium nitrite, Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 241k lb |
| FISHER-BARTON SPECIALTY PRODUCTS | WATERTOWN | Sodium nitrite, Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 87k lb |
| BALL CONTAINER LLC | FORT ATKINSON | Certain glycol ethers, n-Butyl alcohol | 75k lb |
| AZTALAN BIO | JOHNSON CREEK | Acetaldehyde, Formic acid | 29k lb |
| FIBERDOME PRODUCTS LLC PLANT 2 | LAKE MILLS | Styrene | 28k lb |
| MASTERMOLD LLC | JOHNSON CREEK | n-Butyl alcohol, Styrene | 27k lb |
| WHITEWATER GENERATING STATION | WHITEWATER | Ammonia | 15k lb |
| GENERAC POWER SYSTEMS INC-WHITEWATER | WHITEWATER | Methyl methacrylate | 10k lb |
| MILKRITE INTERPULS INC | JOHNSON CREEK | Phthalic anhydride, Zinc compounds | 5k lb |
| DIVERSEY INC. | WATERTOWN | Lead, Certain glycol ethers | 4k lb |
| OSI INDUSTRIES LLC | FORT ATKINSON | Ammonia | 2k lb |
| HOPPE N.A. | FORT ATKINSON | Chromium, Nickel | 201 lb |
| WISCONSIN INVESTCAST | WATERTOWN | Chromium, Nickel | 132 lb |
| EPIC RESINS | PALMYRA | Diisocyanates | 1 lb |
| JONES DAIRY FARM SOUTH | FORT ATKINSON | - | 0 lb |
| ELECTRONIC TECHNOLOGIES INTERNATIONAL INC | FORT ATKINSON | Lead And Lead Compounds | 0 lb |
| JONES DAIRY FARM | FORT ATKINSON | - | 0 lb |
| EAST WEST WISCONSIN | WHITEWATER | Lead | 0 lb |
Underground fuel tanks
EPA's UST Finder records 472 tank facilities in Jefferson: 155 tanks in service and 996 closed. 270 fuel releases are on record, of which 14 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Jefferson 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 Jefferson, including sites assessed but never listed. Presence here records that EPA had reason to look, not a finding of danger.
- ALPHA CAST, INCORPORATIONPALMYRA
- APPLIED MOLDED PRODUCTS CORPORATIONWATERTOWN
- DAN'S WASHBOARDJOHNSON CREEK
- FORT ATKINSON OAK ST. FIRE SITEFORT ATKINSON
- GAUTHIER PROPERTYWATERLOO
- KECK FARMWATERTOWN
- ROCKVALE PLATINGIXONIA
- SANITARY TRANSFER & LANDFILL - KOSHKONONGKOSHKONONG
- SULLIVAN WI MERCURY SPILL SITESULLIVAN