Danbury, Connecticut Water Quality Report
Water quality data for 21 water systems serving 65,019 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| PFBS | 0.004 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFOA | 0.005 | 0.004 ug/L | 0.090 ug/L(EWG) | 135% | Above limit |
| PFPeA | 0.003 | 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 (10)
72
Aug 10, 2025
2C
Jul 28, 2025
2C
Jul 28, 2025
51
Jul 1, 2025
75
Dec 4, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
72
Aug 10, 2024
Resolved Violations (490)
72
Aug 10, 2025
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
+ 485 more resolved violations
Frequently Asked Questions
Is Danbury tap water safe to drink?
Danbury's water has 1 contaminant detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Danbury tap water?
4 contaminants have been detected in Danbury's water supply across 21 water systems. See the full contaminant table above for details.
How can I improve my water quality in Danbury?
Install a water filter rated for the specific contaminants found in Danbury's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Danbury have any water quality violations?
Yes, Danbury currently has 206 active violations. See the violations section above for details.