Connecticut tap water by county
Hardness, PFAS sampling, lead and violations for the largest water systems in 3 Connecticut counties. In 3 of them, at least one large system detected PFAS in EPA testing (a detection isn't a violation).
| County | Largest system | Hardness | PFAS detected |
|---|---|---|---|
| Fairfield County | Aquarion-Eastern Fairfield County | 3.0 gpg (high) | 5 of 6 systems |
| Hartford County | Metropolitan District Commission | 0.9 gpg (high) | 4 of 6 systems |
| New Haven County | Regional Water Authority | 4.4 gpg (low) | 4 of 6 systems |
Public-record figures, not a test of your tap. Not 100% accurate or guaranteed. Confirm with a water test, your utility or a qualified pro before you buy or act.
Hardness confidence: high = utility report; low = county estimate of untreated local water. Don't see your county? Use the water quality lookup.