A86/100
Norwalk Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 40,256 residents · Connecticut
What's In Norwalk's Tap Water?
69
Contaminants Tested
1
Exceed EPA Limits
1
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOA | 0.004 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2021 – August 23, 2021Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
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
NORWALK FIRST TAXING DISTRICT
Population Served
40,256
Water Source
Surface Water
System ID
CT1030011
Frequently Asked Questions About Norwalk Water
Is Norwalk tap water safe to drink?
Norwalk, Connecticut tap water receives a grade of A (86/100), which is considered excellent. Out of 69 contaminants tested, 1 exceed EPA maximum contaminant levels (MCLs) and 2 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Norwalk's water?
Of the 69 contaminants tested in Norwalk's water supply, the most notable include PFOA, Lead (90th percentile). 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Norwalk have any water quality violations?
Yes, Norwalk has 3 EPA violation(s) on record, with the most recent in 2021. Violation types include MR, Other. None of these are classified as health-based violations.
Do I need a water filter in Norwalk?
Based on EPA data, using a water filter in Norwalk is recommended. 1 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 Norwalk's tap water come from?
Norwalk's drinking water is sourced from surface water and supplied by NORWALK FIRST TAXING DISTRICT. The system serves approximately 40,256 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Norwalk'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. Norwalk'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 Norwalk's water compare to other cities in Connecticut?
Norwalk's water quality score of 86/100 earns a grade of A, which is considered excellent. This places Norwalk among the better-performing water systems in Connecticut. Visit our Connecticut state page to see how all cities in the state compare.
What should I do if I'm concerned about Norwalk's water quality?
If you have concerns about Norwalk'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 (NORWALK FIRST TAXING DISTRICT) 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.