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Not health advice. Contact your local water utility for concerns.
Data from EPA Water Quality Reports. For official information, contact your water utility or health department.
Complete guide to contaminants detected in Connecticut drinking water supplies
These contaminants have been detected at elevated levels (above 50% of EPA limits) in one or more Connecticut cities.
Brain damage in children, developmental delays, high blood pressure, kidney damage
Increased cancer risk (bladder), liver and kidney damage, potential reproductive effects
Increased cancer risk, potential liver damage, developmental effects
Browse all contaminants tracked in Connecticut water supplies. Click any contaminant to see which cities are affected.
Brain damage in children, developmental delays, high blood pressure, kidney damage
Increased cancer risk (skin, bladder, lung), skin damage, cardiovascular disease, diabetes
No detections reported
Thyroid disease, increased cholesterol, immune system effects, increased cancer risk
Blue baby syndrome in infants, pregnancy complications, potential cancer risk
Potential carcinogen, liver and kidney damage, gastrointestinal effects
Dental fluorosis (tooth discoloration), skeletal problems at high levels, potential thyroid effects
No detections reported
Eye and nose irritation, unpleasant taste, formation of disinfection byproducts
Gastrointestinal distress, liver and kidney damage with long-term exposure
No detections reported
Kidney damage, neurological effects, developmental problems in children
No detections reported
Gastrointestinal illness, diarrhea, vomiting, potential kidney damage from E. coli
No detections reported
Hair loss, nerve damage, liver and kidney damage, gastrointestinal effects
No detections reported
Increased risk of bone cancer and leukemia from long-term exposure
No detections reported
Kidney damage and potential kidney failure, increased cancer risk
Increased cancer risk (bladder), liver and kidney damage, potential reproductive effects
Increased cancer risk, potential liver damage, developmental effects
This page provides a comprehensive overview of water contaminants detected in Connecticut's public water systems. Our data is compiled from EPA Safe Drinking Water Information System (SDWIS) reports and local water utility Consumer Confidence Reports (CCRs).
Water quality varies significantly across Connecticut, influenced by factors such as:
Click on any contaminant above to see detailed information including health effects, which cities are most affected, and recommended water filtration options.