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.

Inorganics

Cadmium in Connecticut Drinking Water

Cadmium has been detected in water systems serving 7,216 ZIP codes nationwide. Here is what you need to know about cadmium in your drinking water and how it may affect your household.

What Is Cadmium?

Cadmium is a toxic heavy metal that enters drinking water through corrosion of galvanized pipes, erosion of natural deposits, discharge from metal refineries, and runoff from batteries and paints. The EPA maximum contaminant level is 5 parts per billion. California's public health goal is 0.04 ppb. Chronic exposure primarily damages the kidneys and can cause bone demineralization over time.

Is Cadmium in Your Water?

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

Check Your ZIP Code

Health Effects of Cadmium

Kidney damage

Safety Guidelines

Health Guideline

0.00004 mg/L

Source: CA_OEHHA_PHG

Legal Limit (MCL)

0.005 mg/L

EPA Maximum Contaminant Level

Where Does Cadmium Come From?

Corrosion of galvanized pipes; erosion of natural deposits; discharge from metal refineries; runoff from waste batteries and paints

How to Reduce Cadmium in Your Water

1Install a point-of-use reverse osmosis system certified to NSF/ANSI Standard 58 for cadmium reduction, which removes approximately 93 to 98% of dissolved cadmium.
2Use an activated carbon block filter certified to NSF/ANSI Standard 53 for heavy metal reduction; verify that cadmium is specifically listed on the performance data sheet.
3Distillation units effectively remove cadmium since the metal does not volatilize at water's boiling point and remains in the boiling chamber.
4If your home has galvanized steel pipes, consider replacing them with copper or PEX piping to eliminate the primary source of cadmium in household plumbing.

Who Is Most Vulnerable to Cadmium?

The safe level of cadmium 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 Cadmium in my tap water?▾

Cadmium has been detected in water systems across 7,216 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 Cadmium is safe?▾

The safe level depends on who is drinking the water. The health guideline is 0.00004 mg/L, 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 Cadmium from my water?▾

Install a point-of-use reverse osmosis system certified to NSF/ANSI Standard 58 for cadmium reduction, which removes approximately 93 to 98% of dissolved cadmium. Use an activated carbon block filter certified to NSF/ANSI Standard 53 for heavy metal reduction; verify that cadmium is specifically listed on the performance data sheet. For a personalized consultation, contact Valiant Energy Solutions at (475) 557-5107.

Related Contaminants

Nitrate Copper Lead Barium Fluoride

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