Is my tap water safe to drink in Connecticut?

It depends on your ZIP code and who lives in your home. CheckYourTap analyzes 120+ contaminants in your local water supply and shows which ones exceed health guidelines — not just legal limits. Many contaminants are legal but still pose health risks, especially for babies, pregnant women, elderly, and pets.

What contaminants are in Connecticut tap water?

Connecticut tap water commonly contains disinfection byproducts (haloacetic acids, trihalomethanes), lead from aging pipes, PFAS (forever chemicals), nitrates, arsenic, and radionuclides like radium. The specific contaminants and levels vary by water system — enter your ZIP code to see your local results.

How does CheckYourTap differ from EWG or other water quality databases?

CheckYourTap is the only water quality report personalized for your household composition. Tell us who lives in your home — babies, children, pregnant women, elderly, dogs, or cats — and we calculate adjusted safe levels for each person. A contaminant safe for adults may exceed guidelines for infants by 8x or more.

Is CheckYourTap free?

Yes, CheckYourTap is completely free. Enter your Connecticut ZIP code and household members to get a personalized water quality report with health risk assessments for 120+ contaminants.

Does CheckYourTap cover well water in Connecticut?

Yes. CheckYourTap covers both city water (public water systems) and private well water in Connecticut. Well water reports use USGS groundwater data and include geology-based risk factors for arsenic, uranium, and radon specific to your area.

Pesticides

Alpha-Hexachlorocyclohexane in Connecticut Drinking Water

Alpha-Hexachlorocyclohexane has been detected in water systems serving 3,384 ZIP codes nationwide. Here is what you need to know about alpha-hexachlorocyclohexane in your drinking water and how it may affect your household.

What Is Alpha-Hexachlorocyclohexane?

Alpha-hexachlorocyclohexane (alpha-HCH) is a legacy organochlorine pesticide and a byproduct of lindane production. It persists in groundwater near former agricultural and industrial sites due to its environmental stability. No EPA maximum contaminant level has been set specifically for alpha-HCH. It is classified as a probable human carcinogen and is associated with liver damage, immune system effects, and neurological harm from chronic exposure.

Is Alpha-Hexachlorocyclohexane in Your Water?

Enter your Connecticut ZIP code to find out if alpha-hexachlorocyclohexane is in your local water — and see personalized health risks for your household.

Check Your ZIP Code

Health Effects of Alpha-Hexachlorocyclohexane

Probable human carcinogen. Liver damage, immune system effects, neurological harm.

Where Does Alpha-Hexachlorocyclohexane Come From?

Legacy pesticide (lindane-related); contaminated groundwater near former agricultural and industrial sites.

How to Reduce Alpha-Hexachlorocyclohexane in Your Water

1Install a point-of-use activated carbon block filter certified to NSF/ANSI Standard 53 for organic contaminant reduction; activated carbon has strong adsorption capacity for organochlorine compounds.
2A reverse osmosis system certified to NSF/ANSI Standard 58 provides additional removal of alpha-HCH and related legacy pesticide residues.
3For whole-house treatment, use a granular activated carbon tank system at the point of entry, which is effective for chlorinated organic compounds.
4Test water through a certified laboratory if located near former agricultural or pesticide manufacturing sites, and replace carbon media on the manufacturer's schedule.

Who Is Most Vulnerable to Alpha-Hexachlorocyclohexane?

The safe level of alpha-hexachlorocyclohexane varies significantly depending on who is drinking the water. CheckYourTap calculates adjusted safe levels for each member of your household:

Infants (under 1 year)

Toddlers (1-3 years)

Children (4-11 years)

Pregnant women

Elderly (65+)

Adults

Dogs

Cats

A contaminant level that is safe for an adult may exceed guidelines for an infant by 4-8x or more. Check your ZIP code to see personalized results.

Frequently Asked Questions

Is Alpha-Hexachlorocyclohexane in my tap water?▾

Alpha-Hexachlorocyclohexane has been detected in water systems across 3,384 ZIP codes. Whether it's in your specific water depends on your local water system. Enter your CT ZIP code at CheckYourTap.com for a free, instant report.

What level of Alpha-Hexachlorocyclohexane is safe?▾

The safe level depends on who is drinking the water. Health guidelines vary by source, but infants, pregnant women, and pets may need much lower levels. CheckYourTap calculates adjusted safe levels for 11 different household member types.

How do I remove Alpha-Hexachlorocyclohexane from my water?▾

Install a point-of-use activated carbon block filter certified to NSF/ANSI Standard 53 for organic contaminant reduction; activated carbon has strong adsorption capacity for organochlorine compounds. A reverse osmosis system certified to NSF/ANSI Standard 58 provides additional removal of alpha-HCH and related legacy pesticide residues. For a personalized consultation, contact Valiant Energy Solutions at (475) 557-5107.

Related Contaminants

Ethoprop Oxyfluorfen Total Permethrin Dimethipin Profenofos

Check Water Quality by ZIP Code

Hartford 06103 New Haven 06510 Bridgeport 06604 Stamford 06901 Waterbury 06702 Norwalk 06850 Danbury 06810 Manchester 06040 View all cities →

View all contaminants in Connecticut water

About This Report

This water quality report is compiled from public records filed with the U.S. Environmental Protection Agency, state health departments, and the U.S. Geological Survey. Contaminant levels are evaluated against EPA federal standards and health-based guidelines from leading environmental and public health organizations. CheckYourTap is a service of Valiant Energy Solutions, a Connecticut water quality and energy services company established in 1930.

EPA SDWISUSGS NWISEWG Tap Water DatabaseCA OEHHA Public Health GoalsWHO Drinking Water Guidelines

Last updated March 2026