Ottawa Water Quality Report
6 cities ranked · Average grade: B · Ohio
Avg Score
75.9
Cities Ranked
6
Health Violations
5
PFAS Detected
1
75.9
County avg score
6
Cities ranked
83%
A or B grade
17%
D or F grade
5
Health violations
1
PFAS detected
Grade Distribution
How Ottawa cities scored
A
1
17%
Excellent
B
4
67%
Good
C
0
0%
Fair
D
1
17%
Poor
F
0
0%
Failing
Comparison
County vs Ohio average
▼ 1.4 pts below state average
City Map
Water quality across Ottawa
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Ottawa
County context
291,686
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Ottawa
Industrial polluters nearby
Facilities reporting the most surface-water releases in Ottawa, 2023.
Total reported releases to surface water: 291,686 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
MATERION BRUSH INC ELMORE, OH43416 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 291,683 |
US GYPSUM CO GYPSUM, OH43433 | Lead compounds | 4 |
GRAYMONT DOLIME (OH) INC. GENOA, OH43430 | — | — |
NORTHERN MANUFACTURING CO OAK HARBOR, OH43449 | — | — |
US ARMY NATIONAL GUARD CAMP PERRY RANGES PORT CLINTON, OH43452 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 6 cities in Ottawa
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Marblehead | A- | 86.7 | 865 | 22 | Health Unresolved | |
| 2 | Oak Harbor | B+ | 84.4 | 5K | 8 | Unresolved | |
| 3 | Oak Harber | B+ | 84.2 | 2K | 9 | Health Unresolved | |
| 4 | Genoa | B | 75.6 | 3K | 21 | Health Unresolved | |
| 5 | Put-In-Bay | B- | 71.1 | 700 | 68 | Health Unresolved | |
| 6 | Port Clinton | D+ | 53.2 | 27K | 220 | Health Unresolved |