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

#CityScorePopulationViolations
1SheltonC (55)686,707868
2New HavenC (58)418,90031
3HartfordA (98)390,8872
4ClintonC (49)231,4461125
5WaterburyA (86)107,27111
6New BritainA (83)73,53417
7DanburyF (0)62,05599
8MeridenD (22)58,44154
9BristolF (0)52,079118
10ManchesterC (59)51,19814
11WaterfordF (17)44,198157
12MiddletownC (53)43,94782
13SouthingtonF (0)43,069299
14WiltonF (1)42,00076
15NorwalkA (86)40,2563
16WallingfordF (6)37,26794
17NorwichF (17)36,16328
18MonroeD (31)35,05070
19UncasvilleB (73)33,26132
20GrotonA (81)32,60027
21StorrsB (66)27,19919
22MashantucketF (13)26,44545
23EnfieldD (26)25,38489
24Mansfield CenterC (58)21,21412
25NianticF (0)15,245218
26CromwellF (10)14,31683
27BethelF (0)10,822171
28OakvilleF (2)9,97255
29Gales FerryB (67)8,42539
30BerlinD (37)8,003223
31WinstedF (12)7,78460
32KensingtonB (60)7,55337
33PutnamF (0)7,300143
34WatertownF (15)6,71878
35LedyardA (83)5,66313
36PortlandC (57)5,01015
37ColchesterD (29)4,02063
38NewtownC (59)2,61022
39WolcottC (42)2,55046
40WethersfieldF (0)2,385154
41GranbyD (39)2,15157
42NoankB (76)1,94724
43DurhamF (0)1,60167
44TariffvilleC (45)1,47743
45TollandA (82)1,2516
46BalticC (41)1,05859