Connecticut Water Quality Reports
Browse free water quality reports for 226 cities and 300 ZIP codes across Connecticut. Each page preserves the established ZIP route and historical public-record catalog; the live lookup provides current source-grain records and exact released health references. Neither identifies a property’s serving utility or tests its tap or well. Historical catalog counts remain for continuity; use the live report for current source records.
226
Cities
300
ZIP Codes
Up to 119
Historical contaminant records, by ZIP
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Why Water Quality Varies Across Connecticut
Connecticut ZIPs can be associated with more than one public water system, and a ZIP boundary is not a service-area boundary. That is why these pages preserve the catalog and route identity while the live report retains each source system and measurement row separately.
Historical records include naturally occurring substances, treatment byproducts, infrastructure contaminants, and newer monitoring programs. A record’s presence does not establish current exposure at a property, and an absent record does not prove absence from a tap or private well.
Health-protective comparisons lead with exact EWG or OEHHA references when analyte identity and physical units match. EPA values are kept as legal or regulatory context, not CheckYourTap’s definition of what is healthy.
Common Contaminants in CT Water
Learn about specific contaminants found in Connecticut drinking water.