F0/100
Danbury Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 62,055 residents · Connecticut
What's In Danbury'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 | 0.005 µg/L | 0.004 µg/L | Over Limit |
chlorate | 520.00 µg/L | — | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
1
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2021 – December 31, 2021Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 1 — URGENTResolved
Violation related to Nitrate
When: July 1, 2021 – July 31, 2021Rule: Surface Water Treatment 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
DANBURY WATER DEPARTMENT
Population Served
62,055
Water Source
Surface Water
System ID
CT0340011
Frequently Asked Questions About Danbury Water
Is Danbury tap water safe to drink?
Danbury, Connecticut tap water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA maximum contaminant levels and 99 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Danbury's water?
Of the 69 contaminants tested in Danbury's water supply, the most notable include PFOA, chlorate. 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 Danbury have any water quality violations?
Yes, Danbury has 99 EPA violation(s) on record, with the most recent in 2021. Violation types include MR, TT, Other. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Danbury?
Based on EPA data, using a water filter in Danbury 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 Danbury's tap water come from?
Danbury's drinking water is sourced from surface water and supplied by DANBURY WATER DEPARTMENT. The system serves approximately 62,055 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Danbury'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. Danbury'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 Danbury's water compare to other cities in Connecticut?
Danbury's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Connecticut state page to see how all cities in the state compare.
What should I do if I'm concerned about Danbury's water quality?
If you have concerns about Danbury'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 (DANBURY WATER DEPARTMENT) 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.