F0/100
DANBURY WATER DEPARTMENT — Water Quality Report 2026
Serving 62,055 people · Connecticut
Water Source
Surface Water
County
—
System ID
CT0340011
Violations
99
Contaminant Test Results
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
Frequently Asked Questions About DANBURY WATER DEPARTMENT
Is DANBURY WATER DEPARTMENT water safe to drink?
DANBURY WATER DEPARTMENT water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 99 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has DANBURY WATER DEPARTMENT detected?
69 contaminants were tested in DANBURY WATER DEPARTMENT's water. Notable contaminants include PFOA, chlorate. 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does DANBURY WATER DEPARTMENT have any EPA violations?
Yes, DANBURY WATER DEPARTMENT has 99 EPA violation(s) on record, with the most recent in 2021. Violation types include MR, TT, Other. 1 are health-based violations.
How many people does DANBURY WATER DEPARTMENT serve?
DANBURY WATER DEPARTMENT serves approximately 62,055 people, Connecticut. The system provides water to 4 communities: Bethel, Brookfield, Danbury, Ridgefield.
What type of water does DANBURY WATER DEPARTMENT provide?
DANBURY WATER DEPARTMENT sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CT0340011.
How does DANBURY WATER DEPARTMENT compare to other utilities in Connecticut?
DANBURY WATER DEPARTMENT scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Connecticut state page for a full comparison of water systems.