Dubuque Water Quality Report
7 cities ranked · Average grade: A- · Iowa
Avg Score
85.6
Cities Ranked
7
Health Violations
4
PFAS Detected
3
85.6
County avg score
7
Cities ranked
86%
A or B grade
14%
D or F grade
4
Health violations
3
PFAS detected
Grade Distribution
How Dubuque cities scored
A
6
86%
Excellent
B
0
0%
Good
C
0
0%
Fair
D
0
0%
Poor
F
1
14%
Failing
Comparison
County vs Iowa average
▼ 1.9 pts below state average
City Map
Water quality across Dubuque
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Dubuque
Best cities
Worst cities
County context
1
Superfund site in Dubuque
92.8%
of residents on fluoridated water (CDC, 2020)
63
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Dubuque
Industrial polluters nearby
Facilities reporting the most surface-water releases in Dubuque, 2023.
Total reported releases to surface water: 63 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
JOHN DEERE DUBUQUE WORKS DUBUQUE, IA52001 | Zinc compounds | 41 |
MORRISON BROTHERS CO DUBUQUE, IA52001 | Copper | 10 |
AY MCDONALD MANUFACTURING CO DUBUQUE, IA52002 | Lead And Lead Compounds | 6 |
MODERNFOLD INC. DYERSVILLE, IA52040 | Lead | 4 |
GIESE MANUFACTURING DUBUQUE, IA52002 | Manganese | 3 |
+ 5 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Superfund sites
Superfund sites in Dubuque
Superfund sites nearby
Federally tracked hazardous-waste sites within Dubuque on the EPA National Priorities List.
- PEOPLES NATURAL GAS CO
Source: EPA Superfund National Priorities List
Full Rankings
All 7 cities in Dubuque
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Asbury | A+ | 97.8 | 6K | 0 | Zero violations | |
| 2 | Cascade | A | 94.1 | 2K | 13 | Unresolved | |
| 3 | Farley | A | 93.2 | 2K | 9 | Health Unresolved | |
| 4 | Epworth | A | 92.3 | 2K | 5 | Unresolved | |
| 5 | Dyersville | A | 90.2 | 4K | 43 | Health Unresolved | |
| 6 | Peosta | A- | 88.8 | 3K | 65 | Health Unresolved | |
| 7 | Dubuque | F | 42.5 | 63K | 354 | Health PFAS Unresolved |