Iowa Water Quality Report
8 cities ranked · Average grade: B · Wisconsin
Avg Score
78.4
Cities Ranked
8
Health Violations
7
PFAS Detected
0
78.4
County avg score
8
Cities ranked
75%
A or B grade
0%
D or F grade
7
Health violations
0
PFAS detected
Grade Distribution
How Iowa cities scored
A
3
38%
Excellent
B
3
38%
Good
C
2
25%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Wisconsin average
▲ 0.4 pts above state average
City Map
Water quality across Iowa
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Iowa
Best cities
Worst cities
County context
73.9%
of residents on fluoridated water (CDC, 2020)
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Iowa
Industrial polluters nearby
Facilities reporting the most surface-water releases in Iowa, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
CUMMINS EMISSIONS SOLUTIONS MINERAL POINT, WI53565 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 8 cities in Iowa
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Highland | A | 91.2 | 842 | 7 | Health Unresolved | |
| 2 | Dodgeville | A- | 89 | 5K | 18 | Health Unresolved | |
| 3 | Ridgeway | A- | 85.3 | 690 | 60 | Health Unresolved | |
| 4 | Linden | B+ | 83 | 547 | 6 | Unresolved | |
| 5 | Avoca | B+ | 80 | 637 | 39 | Health Unresolved | |
| 6 | Barneveld | B | 78.5 | 1K | 10 | Health Unresolved | |
| 7 | Mineral Point | C | 64.8 | 2K | 30 | Health Lead Unresolved | |
| 8 | Arena | C- | 55.6 | 926 | 70 | Health Unresolved |