C55/100
Connecticut Tap Water Quality Rankings 2026
46 cities · 2,748,432 people served
Top Contaminant Concerns
PFOACopper (90th percentile)PFOSLead (90th percentile)
All Cities in Connecticut
| # | City | Score | Population | Violations |
|---|---|---|---|---|
| 1 | Shelton | C (55) | 686,707 | 868 |
| 2 | New Haven | C (58) | 418,900 | 31 |
| 3 | Hartford | A (98) | 390,887 | 2 |
| 4 | Clinton | C (49) | 231,446 | 1125 |
| 5 | Waterbury | A (86) | 107,271 | 11 |
| 6 | New Britain | A (83) | 73,534 | 17 |
| 7 | Danbury | F (0) | 62,055 | 99 |
| 8 | Meriden | D (22) | 58,441 | 54 |
| 9 | Bristol | F (0) | 52,079 | 118 |
| 10 | Manchester | C (59) | 51,198 | 14 |
| 11 | Waterford | F (17) | 44,198 | 157 |
| 12 | Middletown | C (53) | 43,947 | 82 |
| 13 | Southington | F (0) | 43,069 | 299 |
| 14 | Wilton | F (1) | 42,000 | 76 |
| 15 | Norwalk | A (86) | 40,256 | 3 |
| 16 | Wallingford | F (6) | 37,267 | 94 |
| 17 | Norwich | F (17) | 36,163 | 28 |
| 18 | Monroe | D (31) | 35,050 | 70 |
| 19 | Uncasville | B (73) | 33,261 | 32 |
| 20 | Groton | A (81) | 32,600 | 27 |
| 21 | Storrs | B (66) | 27,199 | 19 |
| 22 | Mashantucket | F (13) | 26,445 | 45 |
| 23 | Enfield | D (26) | 25,384 | 89 |
| 24 | Mansfield Center | C (58) | 21,214 | 12 |
| 25 | Niantic | F (0) | 15,245 | 218 |
| 26 | Cromwell | F (10) | 14,316 | 83 |
| 27 | Bethel | F (0) | 10,822 | 171 |
| 28 | Oakville | F (2) | 9,972 | 55 |
| 29 | Gales Ferry | B (67) | 8,425 | 39 |
| 30 | Berlin | D (37) | 8,003 | 223 |
| 31 | Winsted | F (12) | 7,784 | 60 |
| 32 | Kensington | B (60) | 7,553 | 37 |
| 33 | Putnam | F (0) | 7,300 | 143 |
| 34 | Watertown | F (15) | 6,718 | 78 |
| 35 | Ledyard | A (83) | 5,663 | 13 |
| 36 | Portland | C (57) | 5,010 | 15 |
| 37 | Colchester | D (29) | 4,020 | 63 |
| 38 | Newtown | C (59) | 2,610 | 22 |
| 39 | Wolcott | C (42) | 2,550 | 46 |
| 40 | Wethersfield | F (0) | 2,385 | 154 |
| 41 | Granby | D (39) | 2,151 | 57 |
| 42 | Noank | B (76) | 1,947 | 24 |
| 43 | Durham | F (0) | 1,601 | 67 |
| 44 | Tariffville | C (45) | 1,477 | 43 |
| 45 | Tolland | A (82) | 1,251 | 6 |
| 46 | Baltic | C (41) | 1,058 | 59 |