57.8
County avg score
17
Cities ranked
29%
A or B grade
47%
D or F grade
15
Health violations
12
PFAS detected
Grade Distribution
How New London cities scored
A
0
0%
Excellent
B
5
29%
Good
C
4
24%
Fair
D
4
24%
Poor
F
4
24%
Failing
Comparison
County vs Connecticut average
▼ 3.0 pts below state average
City Map
Water quality across New London
Each dot is a city, colored by grade. Click any city to view its full report.
Highlights
Top & bottom cities in New London
Best cities
Worst cities
Full Rankings
All 17 cities in New London
| # | City | Grade | Score | Score | Population | Violations | Issues |
|---|---|---|---|---|---|---|---|
| 1 | Sprague | B+ | 83.4 | 1K | 60 | Unresolved | |
| 2 | Bozrah | B | 78.8 | 36K | 29 | Health PFAS Unresolved | |
| 3 | Franklin | B | 78.8 | 36K | 29 | Health PFAS Unresolved | |
| 4 | Stonington | B | 75 | 11K | 88 | Health Unresolved | |
| 5 | Norwich | B- | 70.5 | 36K | 72 | Health PFAS Unresolved | |
| 6 | New London | C+ | 68.2 | 28K | 158 | Unresolved | |
| 7 | North Stonington | C | 63.2 | 2K | 267 | Health Unresolved | |
| 8 | East Lyme | C | 60.2 | 15K | 219 | Health PFAS Unresolved | |
| 9 | Waterford | C- | 55 | 44K | 307 | Health Unresolved | |
| 10 | Ledyard | D+ | 52.8 | 6K | 123 | Health Unresolved | |
| 11 | Preston | D+ | 52 | 36K | 132 | Health PFAS Unresolved | |
| 12 | Old Lyme | D | 46 | 541 | 778 | Health Unresolved | |
| 13 | Colchester | D | 45 | 4K | 663 | Health PFAS Unresolved | |
| 14 | Griswold | F | 42.4 | 7K | 361 | Health Unresolved | |
| 15 | Groton | F | 41.5 | 33K | 305 | Health Unresolved | |
| 16 | Montville | F | 35.9 | 36K | 1243 | Health PFAS Unresolved | |
| 17 | Lisbon | F | 33.8 | 36K | 278 | Health PFAS Unresolved |