C55/100

Shelton Tap Water Quality: Is It Safe to Drink? (2026 Report)

Serving 686,707 residents · Connecticut

What's In Shelton's Tap Water?

76
Contaminants Tested
1
Exceed EPA Limits
1
Above EPA Goals
2 contaminants above EPA health goals
ContaminantDetectedLimit (MCL)Status
PFOA
0.004 µg/L0.004 µg/LOver Limit
chlorate
660.00 µg/LAbove Goal

EPA Violation History

No violations in the past 5 years

Full EPA compliance since 2021.

Understanding violation severity

Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.

Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly

Water Utility Details

AQUARION-EASTERN FAIRFIELD COUNTY
Population Served

351,756

Water Source

Surface Water

System ID

CT0150011

AQUARION-DARIEN
Population Served

18,737

Water Source

Purchased Surface Water

System ID

CT0350011

AQUARION-EAST DERBY
Population Served

1,101

Water Source

Purchased Surface Water

System ID

CT0378011

AQUARION-GREENWICH
Population Served

53,297

Water Source

Surface Water

System ID

CT0570011

AQUARION-LITCHFIELD REGIONAL
Population Served

3,097

Water Source

Purchased Surface Water

System ID

CT0740011

AQUARION-MARLBOROUGH
Population Served

1,348

Water Source

Groundwater

System ID

CT0798013

AQUARION-NEW CANAAN
Population Served

10,097

Water Source

Purchased Surface Water

System ID

CT0900011

AQUARION-NEW HARTFORD
Population Served

1,872

Water Source

Groundwater

System ID

CT0920011

AQUARION-NEW MILFORD REGIONAL
Population Served

13,331

Water Source

Groundwater

System ID

CT0960011

AQUARION-NEWTOWN REGIONAL
Population Served

6,054

Water Source

Groundwater

System ID

CT0970011

AQUARION-NORTH CANAAN
Population Served

1,481

Water Source

Groundwater

System ID

CT1000011

AQUARION-PLAINVILLE REGIONAL
Population Served

18,231

Water Source

Groundwater

System ID

CT1100011

AQUARION-RIDGEFIELD
Population Served

7,476

Water Source

Purchased Surface Water

System ID

CT1180011

AQUARION-SALISBURY
Population Served

1,932

Water Source

Surface Water

System ID

CT1220011

AQUARION-VALLEY
Population Served

13,080

Water Source

Purchased Surface Water

System ID

CT1240011

AQUARION-SIMSBURY REGIONAL
Population Served

14,691

Water Source

Groundwater

System ID

CT1280021

AQUARION-STAMFORD
Population Served

119,214

Water Source

Surface Water

System ID

CT1350011

AQUARION-MYSTIC
Population Served

10,788

Water Source

Surface Water

System ID

CT1370011

TORRINGTON WATER COMPANY
Population Served

37,915

Water Source

Surface Water

System ID

CT1430011

AQUARION-WOODBURY
Population Served

1,209

Water Source

Groundwater

System ID

CT1680011

Frequently Asked Questions About Shelton Water

Is Shelton tap water safe to drink?

Shelton, Connecticut tap water receives a grade of C (55/100), which is considered fair. 3 contaminant(s) exceed EPA maximum contaminant levels and 868 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.

What contaminants are in Shelton's water?

Of the 77 contaminants tested in Shelton's water supply, the most notable include PFOA, PFOS, Copper (90th percentile), Lead (90th percentile), chlorate. 3 contaminant(s) exceed EPA legal limits (MCLs). 5 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.

Does Shelton have any water quality violations?

Yes, Shelton has 868 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, MON, Other. 20 of these are health-based violations, which are the most serious category.

Do I need a water filter in Shelton?

Based on EPA data, using a water filter in Shelton is recommended. 3 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.

Where does Shelton's tap water come from?

Shelton's drinking water is sourced from surface water and supplied by AQUARION-EASTERN FAIRFIELD COUNTY and 19 other water system(s). The system serves approximately 686,707 people. Surface water sources include rivers, lakes, and reservoirs.

How often is Shelton's water tested?

Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Shelton's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.

How does Shelton's water compare to other cities in Connecticut?

Shelton's water quality score of 55/100 earns a grade of C, which is considered fair. This is a below-average score that indicates room for improvement. Visit our Connecticut state page to see how all cities in the state compare.

What should I do if I'm concerned about Shelton's water quality?

If you have concerns about Shelton's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (AQUARION-EASTERN FAIRFIELD COUNTY) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.

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