A86/100
WATERBURY WATER DEPARTMENT — Water Quality Report 2026
Serving 107,271 people · Connecticut
Water Source
Surface Water
County
—
System ID
CT1510011
Violations
11
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
5
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – July 15, 2024Enforcement: Resolving — corrective action underway
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, 2022 – February 9, 2023Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: August 10, 2022 – October 25, 2022Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: August 10, 2021 – June 30, 2021Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2021 – June 30, 2021Enforcement: 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 WATERBURY WATER DEPARTMENT
Is WATERBURY WATER DEPARTMENT water safe to drink?
WATERBURY WATER DEPARTMENT water receives a grade of A (86/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has WATERBURY WATER DEPARTMENT detected?
76 contaminants were tested in WATERBURY WATER DEPARTMENT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does WATERBURY WATER DEPARTMENT have any EPA violations?
Yes, WATERBURY WATER DEPARTMENT has 11 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MR.
How many people does WATERBURY WATER DEPARTMENT serve?
WATERBURY WATER DEPARTMENT serves approximately 107,271 people, Connecticut. The system provides water to 5 communities: Middlebury, Prospect, Waterbury, Watertown, Wolcott.
What type of water does WATERBURY WATER DEPARTMENT provide?
WATERBURY 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 CT1510011.
How does WATERBURY WATER DEPARTMENT compare to other utilities in Connecticut?
WATERBURY WATER DEPARTMENT scores 86/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Connecticut state page for a full comparison of water systems.