Shiawassee Water Quality Report
7 cities ranked · Average grade: B+ · Michigan
Avg Score
82.8
Cities Ranked
7
Health Violations
5
PFAS Detected
2
82.8
County avg score
7
Cities ranked
86%
A or B grade
0%
D or F grade
5
Health violations
2
PFAS detected
Grade Distribution
How Shiawassee cities scored
A
4
57%
Excellent
B
2
29%
Good
C
1
14%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Michigan average
▲ 1.8 pts above state average
City Map
Water quality across Shiawassee
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Shiawassee
Best cities
Worst cities
County context
76.6%
of residents on fluoridated water (CDC, 2020)
250
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Shiawassee
Industrial polluters nearby
Facilities reporting the most surface-water releases in Shiawassee, 2023.
Total reported releases to surface water: 250 lbs
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
TOLEDO COMMUTATOR CO OWOSSO, MI48867 | Copper | 250 |
CIE NEWCOR MTG CORUNNA, MI48817 | — | — |
GENERAL SHALE BRICK INC. - PLANT 66 CORUNNA, MI48817 | — | — |
CIE NEWCOR MTG OWOSSO, MI48867 | — | — |
GREAT LAKES COMPOSITES LLC OWOSSO, MI48867 | — | — |
+ 3 more facilities
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 7 cities in Shiawassee
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Corunna | A | 90.2 | 2K | 2 | Unresolved | |
| 2 | Durand | A- | 89 | 4K | 36 | Health Unresolved | |
| 3 | New Lothrop | A- | 87.8 | 610 | 10 | Health Unresolved | |
| 4 | Byron | A- | 86.9 | 581 | 13 | Health Unresolved | |
| 5 | Perry | B+ | 82.7 | 2K | 1 | Unresolved | |
| 6 | Bancroft | B | 77.4 | 616 | 22 | Health Unresolved | |
| 7 | Owosso | C+ | 65.5 | 17K | 34 | Health Unresolved |