Jefferson Water Quality Report
9 cities ranked · Average grade: B- · Wisconsin
Avg Score
73.2
Cities Ranked
9
Health Violations
8
PFAS Detected
1
73.2
County avg score
9
Cities ranked
56%
A or B grade
22%
D or F grade
8
Health violations
1
PFAS detected
Grade Distribution
How Jefferson cities scored
A
4
44%
Excellent
B
1
11%
Good
C
2
22%
Fair
D
2
22%
Poor
F
0
0%
Failing
Comparison
County vs Wisconsin average
▼ 4.8 pts below state average
City Map
Water quality across Jefferson
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Jefferson
County context
88.1%
of residents on fluoridated water (CDC, 2020)
43
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Jefferson
Industrial polluters nearby
Facilities reporting the most surface-water releases in Jefferson, 2023.
Total reported releases to surface water: 43 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
WHITEWATER GENERATING STATION WHITEWATER, WI53190 | Ammonia | 43 |
WISCONSIN INVESTCAST WATERTOWN, WI53094 | Nickel | 0 |
MILKRITE INTERPULS INC JOHNSON CREEK, WI53038 | — | — |
MASTERMOLD LLC JOHNSON CREEK, WI53038 | — | — |
AZTALAN BIO JOHNSON CREEK, WI53038 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 9 cities in Jefferson
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Sullivan | A | 91.6 | 525 | 3 | Unresolved | |
| 2 | Waterloo | A- | 89.8 | 4K | 14 | Health Unresolved | |
| 3 | Palmyra | A- | 89.2 | 2K | 16 | Health PFAS Unresolved | |
| 4 | Fort Atkinson | A- | 86.2 | 13K | 26 | Health Unresolved | |
| 5 | Jefferson | B | 76.3 | 8K | 18 | Health Unresolved | |
| 6 | Lake Mills | C+ | 66.1 | 6K | 62 | Health Unresolved | |
| 7 | Johnson Creek | C | 61.6 | 3K | 66 | Health Unresolved | |
| 8 | Ixonia | D+ | 52.4 | 814 | 80 | Health Unresolved | |
| 9 | Watertown | D | 45.4 | 24K | 65 | Health Unresolved |