81.1
County avg score
7
Cities ranked
86%
A or B grade
0%
D or F grade
7
Health violations
0
PFAS detected
Grade Distribution
How Knox cities scored
A
3
43%
Excellent
B
3
43%
Good
C
1
14%
Fair
D
0
0%
Poor
F
0
0%
Failing
Comparison
County vs Maine average
▼ 0.3 pts below state average
City Map
Water quality across Knox
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in Knox
Best cities
Worst cities
County context
84.5%
of residents on fluoridated water (CDC, 2020)
0
lbs/yr to surface water · top 10 TRI facilities
Industrial pollution
Top industrial polluters in Knox
Industrial polluters nearby
Facilities reporting the most surface-water releases in Knox, 2023.
| Facility | Top chemical | To surface water (lbs/yr) |
|---|---|---|
PIKE INDUSTRIES INC-WASHINGTON WASHINGTON, ME04574 | — | — |
INTERNATIONAL N&H USA INC. ROCKLAND, ME04841 | — | — |
FISHER ENGINEERING ROCKLAND, ME04841 | — | — |
NORTH END COMPOSITES ROCKLAND, ME04841 | — | — |
DRAGON PRODUCTS CO THOMASTON, ME04861 | — | — |
Source: EPA Toxic Release Inventory (TRI) 2023
Full Rankings
All 7 cities in Knox
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Rockland | A- | 89.5 | 21K | 7 | Health Unresolved | |
| 2 | Thomaston | A- | 89.5 | 21K | 7 | Health Unresolved | |
| 3 | Warren | A- | 89.4 | 21K | 8 | Health Unresolved | |
| 4 | Camden | B | 79.7 | 21K | 42 | Health Unresolved | |
| 5 | North Haven | B | 77.1 | 740 | 171 | Health Unresolved | |
| 6 | Rockport | B- | 73 | 21K | 15 | Health Unresolved | |
| 7 | Vinalhaven | C+ | 69.4 | 1K | 46 | Health Unresolved |