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Water Quality in Norwalk, CT 06853

Water testing in Norwalk (06853) has identified 77 contaminants — nearly 3x the state average. This is among the highest detection counts in Connecticut, which means residents here face a wider range of potential exposures than most of the state. For households with infants, elderly members, or pets, the risks may be compounded because many of these contaminants have stricter health guidelines for vulnerable populations.

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See how 77 contaminants affect your specific household members — babies, children, pregnant women, elderly, dogs, and cats.

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Key Facts About Norwalk Water

Contaminants Detected

77

substances found in local water testing

Personalized For

11

household member types including pets

What Norwalk Residents Should Know

Norwalk's water supply has one of the highest contaminant detection counts in Connecticut. Health guidelines from the EWG and California OEHHA are often stricter than federal legal limits — a contaminant can be "legal" but still exceed recommended health levels. This is especially important for babies under one year, whose developing organs are more susceptible to even low-level chemical exposure.

Common Contaminants in Connecticut Water

These are among the most frequently detected contaminants across Connecticut public water systems. Your specific results for 06853 may vary.

NitrateInorganics
CopperInorganics
LeadHeavy Metals
BariumInorganics
FluorideInorganics
Nitrate-NitriteInorganics
ArsenicInorganics
CadmiumInorganics

Frequently Asked Questions

Is the tap water safe to drink in Norwalk, CT?▾
Whether Norwalk tap water is safe depends on your household. While it may meet federal legal limits, many contaminants are present at levels above stricter health guidelines — especially for vulnerable groups like infants, pregnant women, and elderly residents. Enter your ZIP code 06853 above to see your personalized risk assessment.
What contaminants are in 06853 water?▾
77 contaminants have been detected in the water serving ZIP code 06853. Common findings in Connecticut include lead, PFAS (forever chemicals), disinfection byproducts, nitrates, and arsenic. Get your full report to see which ones affect your household.
Is CheckYourTap free?▾
Yes, CheckYourTap is completely free. Enter your ZIP code and tell us who lives in your home to get a personalized water quality report with health risk assessments for 120+ contaminants.
Does Norwalk have well water data?▾
Yes, CheckYourTap covers both city water (public water systems) and private well water in Norwalk and throughout Connecticut. Well water reports use USGS groundwater data and include geology-based risk factors for arsenic, uranium, and radon.

Other ZIP Codes in Norwalk

0685006851068540685506856
View all Connecticut water quality reports

About This Report

Water quality data for Norwalk, CT 06853 is compiled from public records filed with the U.S. Environmental Protection Agency (EPA SDWIS), the U.S. Geological Survey (USGS NWIS), and the Connecticut Department of Public Health. Health guidelines reference the strictest available standards from the EWG, California OEHHA, and WHO. Risk assessments are personalized for 11 household member types. CheckYourTap is a service of Valiant Energy Solutions, a Connecticut company established in 1930.

Last updated March 2026