C58/100
WINDHAM WATER WORKS — Water Quality Report 2026
Serving 21,214 people · Connecticut
Water Source
Surface Water
County
—
System ID
CT1630011
Violations
12
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 280.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2023 – July 10, 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 WINDHAM WATER WORKS
Is WINDHAM WATER WORKS water safe to drink?
WINDHAM WATER WORKS water receives a grade of C (58/100), which is considered fair. 0 contaminant(s) exceed EPA legal limits and 12 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has WINDHAM WATER WORKS detected?
69 contaminants were tested in WINDHAM WATER WORKS's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does WINDHAM WATER WORKS have any EPA violations?
Yes, WINDHAM WATER WORKS has 12 EPA violation(s) on record, with the most recent in 2023. Violation types include Other, MR, TT. 6 are health-based violations.
How many people does WINDHAM WATER WORKS serve?
WINDHAM WATER WORKS serves approximately 21,214 people, Connecticut. The system provides water to 2 communities: Mansfield, Windham.
What type of water does WINDHAM WATER WORKS provide?
WINDHAM WATER WORKS 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 CT1630011.
How does WINDHAM WATER WORKS compare to other utilities in Connecticut?
WINDHAM WATER WORKS scores 58/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Connecticut state page for a full comparison of water systems.