Connecticut Tap Water Quality
Check a Connecticut ZIP Code
Overview
Connecticut drinks from well-protected reservoirs run by large regional utilities: Aquarion and the South Central Connecticut Regional Water Authority among them. State law here is unusually protective, banning wastewater discharges into drinking-water watersheds, so source quality is among the best in the Northeast.
Compliance is correspondingly strong: health-based violations are rare even among small systems. The live issues are PFAS detections in scattered wells, sodium from decades of road salt creeping into groundwater, and lead plumbing in the state's old housing stock.
Common Contaminants in Connecticut
Pre-1950 housing in New Haven, Bridgeport, and Hartford can leach lead from service lines and solder; utilities run corrosion control
Road salt has raised sodium in some wells and small systems, a concern for restricted-sodium diets
Detected in scattered public and private wells; the state set action levels and funds treatment where needed
Violations & Compliance
Connecticut consistently ranks among the states with the fewest health-based violations, helped by watershed-protection laws and consolidation into large professional utilities.
City Reports for Connecticut
We haven't published individual city water reports for Connecticut yet. Use the ZIP lookup for a statewide assessment, and check your utility's annual Consumer Confidence Report for local detail.
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •US EPA Safe Drinking Water Act regulations
- •EWG Tap Water Database
- •The utility's most recent Consumer Confidence Report (CCR)
- •WHO Guidelines for Drinking-water Quality