F2/100
WATERTOWN WATER & SEWER AUTHORITY — Water Quality Report 2026
Serving 9,972 people · Connecticut
Water Source
Purchased Surface Water
County
—
System ID
CT1530021
Violations
55
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 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: August 10, 2025 – August 27, 2025Enforcement: 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, 2024 – January 29, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – July 10, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: August 10, 2023 – July 13, 2023Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – June 30, 2023Enforcement: 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 WATERTOWN WATER & SEWER AUTHORITY
Is WATERTOWN WATER & SEWER AUTHORITY water safe to drink?
WATERTOWN WATER & SEWER AUTHORITY water receives a grade of F (2/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 55 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WATERTOWN WATER & SEWER AUTHORITY detected?
34 contaminants were tested in WATERTOWN WATER & SEWER AUTHORITY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does WATERTOWN WATER & SEWER AUTHORITY have any EPA violations?
Yes, WATERTOWN WATER & SEWER AUTHORITY has 55 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MCL. 10 are health-based violations.
How many people does WATERTOWN WATER & SEWER AUTHORITY serve?
WATERTOWN WATER & SEWER AUTHORITY serves approximately 9,972 people, Connecticut. The system provides water to 3 communities: Middlebury, Waterbury, Watertown.
What type of water does WATERTOWN WATER & SEWER AUTHORITY provide?
WATERTOWN WATER & SEWER AUTHORITY sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CT1530021.
How does WATERTOWN WATER & SEWER AUTHORITY compare to other utilities in Connecticut?
WATERTOWN WATER & SEWER AUTHORITY scores 2/100 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.