Norwalk, Connecticut Water Quality Report
Water quality data for 2 water systems serving 40,356 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| PFBS | 0.006 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFHxS | 0.004 | 0.010 ug/L | 0.001 ug/L(EWG) | 42% | Within limit |
| PFOA | 0.009 | 0.004 ug/L | 0.090 ug/L(EWG) | 238% | Above limit |
| PFOS | 0.011 | 0.004 ug/L | 0.300 ug/L(EWG) | 280% | Above limit |
| PFPeA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Active Violations (4)
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (159)
66
Dec 30, 2021
66
Dec 30, 2021
19
Oct 1, 2019 — Dec 31, 2019
19
Oct 1, 2019 — Dec 31, 2019
71
Jul 1, 2011
+ 154 more resolved violations
Frequently Asked Questions
Is Norwalk tap water safe to drink?
Norwalk's water has 2 contaminants detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Norwalk tap water?
6 contaminants have been detected in Norwalk's water supply across 2 water systems. See the full contaminant table above for details.
How can I improve my water quality in Norwalk?
Install a water filter rated for the specific contaminants found in Norwalk's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Norwalk have any water quality violations?
Yes, Norwalk currently has 4 active violations. See the violations section above for details.