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

Antimony in Connecticut Drinking Water

Antimony has been detected in water systems serving 4,387 ZIP codes nationwide. Here is what you need to know about antimony in your drinking water and how it may affect your household.

What Is Antimony?

Antimony is a metallic element that enters drinking water through discharge from petroleum refineries, fire retardant manufacturing, ceramics production, electronics, and solder. It also occurs naturally in some geological formations. The EPA maximum contaminant level is 6 parts per billion, while the California public health goal is 1 ppb. Chronic exposure at elevated levels may increase blood cholesterol and decrease blood sugar.

Is Antimony in Your Water?

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

Check Your ZIP Code

Health Effects of Antimony

Increase in blood cholesterol; decrease in blood sugar

Safety Guidelines

Health Guideline

0.001 mg/L

Source: CA_OEHHA_PHG

Legal Limit (MCL)

0.006 mg/L

EPA Maximum Contaminant Level

Where Does Antimony Come From?

Discharge from petroleum refineries; fire retardants; ceramics; electronics; solder

How to Reduce Antimony in Your Water

1Install a point-of-use reverse osmosis system certified to NSF/ANSI Standard 58 for antimony reduction, which removes the majority of dissolved antimony from drinking water.
2Use an activated carbon block filter certified to NSF/ANSI Standard 53; verify that antimony is specifically listed on the filter's performance data sheet.
3Distillation units can effectively reduce antimony concentrations since the metal does not volatilize at the boiling point of water.
4Test your water through a certified laboratory to establish baseline antimony levels and retest after treatment installation to confirm reduction.

Who Is Most Vulnerable to Antimony?

The safe level of antimony 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 Antimony in my tap water?▾

Antimony has been detected in water systems across 4,387 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 Antimony is safe?▾

The safe level depends on who is drinking the water. The health guideline is 0.001 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 Antimony from my water?▾

Install a point-of-use reverse osmosis system certified to NSF/ANSI Standard 58 for antimony reduction, which removes the majority of dissolved antimony from drinking water. Use an activated carbon block filter certified to NSF/ANSI Standard 53; verify that antimony is specifically listed on the filter's 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