Rock Water Quality Report
8 cities ranked · Average grade: B · Wisconsin
Avg Score
77.1
Cities Ranked
8
Health Violations
7
PFAS Detected
1
77.1
County avg score
8
Cities ranked
75%
A or B grade
13%
D or F grade
7
Health violations
1
PFAS detected
Grade Distribution
How Rock cities scored
A
3
38%
Excellent
B
3
38%
Good
C
1
13%
Fair
D
1
13%
Poor
F
0
0%
Failing
Comparison
County vs Wisconsin average
▼ 0.9 pts below state average
City Map
Water quality across Rock
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Rock
Best cities
Worst cities
County context
2
Superfund sites in Rock
95.3%
of residents on fluoridated water (CDC, 2020)
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Rock
Industrial polluters nearby
Facilities reporting the most surface-water releases in Rock, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
FRITO-LAY INC BELOIT, WI53511 | — | — |
HORMEL FOODS CORP BELOIT, WI53511 | — | — |
GENENCOR INTERNATIONAL WISCONSIN INC. BELOIT, WI53511 | — | — |
STAINLESS TANK & EQUIPMENT CO LLC BELOIT, WI53511 | — | — |
NORTHSTAR MEDICAL RADIOISOTOPES LLC BELOIT, WI53511 | — | — |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Rock
Superfund sites nearby
Federally tracked hazardous-waste sites within Rock on the EPA National Priorities List.
- JANESVILLE ASH BEDS
- JANESVILLE OLD LANDFILL
Source: EPA Superfund National Priorities List
Full Rankings
All 8 cities in Rock
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Milton | A | 94.2 | 6K | 25 | Health Unresolved | |
| 2 | Orfordville | A | 94.1 | 1K | 10 | Unresolved | |
| 3 | Footville | A- | 86.1 | 816 | 10 | Health Unresolved | |
| 4 | Beloit | B+ | 84 | 37K | 11 | Health Unresolved | |
| 5 | Janesville | B | 78.9 | 66K | 39 | Health Unresolved | |
| 6 | Clinton | B- | 71.6 | 2K | 206 | Health Unresolved | |
| 7 | Evansville | C- | 59.2 | 6K | 117 | Health Unresolved | |
| 8 | Edgerton | D | 49 | 7K | 230 | Health Unresolved |