Mahaska Water Quality Report
2 cities ranked · Average grade: A- · Iowa
Avg Score
89.8
Cities Ranked
2
Health Violations
1
PFAS Detected
1
89.8
County avg score
2
Cities ranked
100%
A or B grade
0%
D or F grade
1
Health violations
1
PFAS detected
Grade Distribution
How Mahaska cities scored
A
2
100%
Excellent
B
0
0%
Good
C
0
0%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Iowa average
▲ 2.3 pts above state average
City Map
Water quality across Mahaska
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Mahaska
Best cities
Worst cities
County context
100.0%
of residents on fluoridated water (CDC, 2020)
12
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Mahaska
Industrial polluters nearby
Facilities reporting the most surface-water releases in Mahaska, 2023.
Total reported releases to surface water: 12 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
CLOW VALVE CO FOUNDRY OSKALOOSA, IA52577 | Copper | 11 |
CLOW VALVE MACHINE SHOP OSKALOOSA, IA52577 | Manganese | 1 |
IOWA WOOD PRESERVERS OSKALOOSA, IA52577 | — | — |
OLDCASTLE LAWN & GARDEN OSKALOOSA, IA52577 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 2 cities in Mahaska
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | New Sharon | A | 93.5 | 1K | 12 | Unresolved | |
| 2 | Oskaloosa | A- | 86 | 23K | 37 | Health Unresolved |