Jefferson, WI
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Jefferson in Wisconsin · Population: 85,867
TRI sites such as Fisher Barton Blades; Fisher-Barton Specialty Products; Ball Container LLC; SDWIS systems such as WATERTOWN WATERWORKS; LAKE MILLS WATERWORKS; WATERLOO WATERWORKS anchor Jefferson, WI's EPA extract. Derived burden score 51/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Jefferson include LAKE MILLS WATERWORKS; WATERLOO WATERWORKS; JOHNSON CREEK WATERWORKS, while Fisher Barton Blades leads reported TRI pounds among local Form R filers. AQS median AQI 39 / peak 93 in 2024.
Burden score 51/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Jefferson -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Jefferson, WI: EPA TRI 2023 reporting year
Same facilities, both years
-15.2%
17 facilities that filed in 2022 and 2023
Whole inventory
-14.7%
660.2 thousand lb → 563.0 thousand lb, every facility that filed
Between the two reporting years, 2 facilities filed for the first time and 0 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Jefferson, WI's total reported releases fell from 660.2 thousand lb in 2022 to 559.8 thousand lb in 2023, based on EPA TRI filings.
- Jefferson, WI's water releases fell from 179 lb in 2022 to 43 lb in 2023, based on EPA TRI filings.
- Jefferson, WI's chemicals reported rose from 23 in 2022 to 37 in 2023, based on EPA TRI filings.
- Jefferson, WI's off-site transfers fell from 513.8 thousand lb in 2022 to 423.4 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 183 (89%) | 22 | 0 | 93 |
| 2023 | 145 (71%) | 43 | 15 | 140 |
| 2022 | 185 (93%) | 15 | 0 | 87 |
| 2021 | 178 (86%) | 29 | 1 | 101 |
| 2020 | 189 (90%) | 17 | 4 | 136 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in Wisconsin, see the EPA's AirNow.gov.
Water Systems (9)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| WATERTOWN WATERWORKS | 23,945 | 0 |
| LAKE MILLS WATERWORKS | 6,211 | 8 |
| WATERLOO WATERWORKS | 3,520 | 6 |
| JOHNSON CREEK WATERWORKS | 3,318 | 1 |
| PALMYRA WATERWORKS | 1,756 | 0 |
| AUTUMN RIDGE WATER SYSTEM LLC | 575 | 1 |
| STANTON PLACE I | 66 | 0 |
| STANTON PLACE II | 32 | 0 |
| ROCK RIVER MOBILE HOME PARK | 30 | 0 |
TRI Facilities (21)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Fisher Barton Blades | 1.3M lbs |
| 2 | Fisher-Barton Specialty Products | 629.6K lbs |
| 3 | Ball Container LLC | 389.9K lbs |
| 4 | Fiberdome Products LLC Plant 2 | 163.1K lbs |
| 5 | Whitewater Generating Station | 117.2K lbs |
| 6 | Mastermold LLC | 80.9K lbs |
| 7 | Generac Power Systems Inc-Whitewater | 27.0K lbs |
| 8 | Milkrite Interpuls Inc | 22.4K lbs |
| 9 | Diversey Inc. | 19.5K lbs |
| 10 | Valero Renewable Fuels | 11.9K lbs |
| 11 | Aztalan Bio | 3.1K lbs |
| 12 | Nestle Purina Petcare | 1.4K lbs |
| 13 | Wisconsin Investcast | 1.0K lbs |
| 14 | Hoppe N.a. | 898 lbs |
| 15 | Osi Industries LLC | 10 lbs |
| 16 | Epic Resins | 7 lbs |
| 17 | East West Wisconsin | 0 lbs |
| 18 | Electronic Technologies International Inc | 0 lbs |
| 19 | Jones Dairy Farm | 0 lbs |
| 20 | Jones Dairy Farm South | 0 lbs |
| 21 | Generac Power Systems Inc-Jefferson | 0 lbs |
Cities in Jefferson (8)
Frequently Asked Questions
What is the environmental risk level in Jefferson, Wisconsin? ▼
Are there Superfund sites in Jefferson? ▼
How many toxic release facilities are in Jefferson? ▼
What is the air quality in Jefferson? ▼
Is the drinking water safe in Jefferson? ▼
What environmental agencies cover Jefferson? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.