F11/100
CHELSEA WATER DEPT. (MWRA) — Water Quality Report 2026
Serving 38,319 people · Massachusetts
Water Source
Purchased Surface Water
County
—
System ID
MA3057000
Violations
18
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
No violations in the past 5 years
Full EPA compliance since 2016.
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 CHELSEA WATER DEPT. (MWRA)
Is CHELSEA WATER DEPT. (MWRA) water safe to drink?
CHELSEA WATER DEPT. (MWRA) water receives a grade of F (11/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 18 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CHELSEA WATER DEPT. (MWRA) detected?
69 contaminants were tested in CHELSEA WATER DEPT. (MWRA)'s water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does CHELSEA WATER DEPT. (MWRA) have any EPA violations?
Yes, CHELSEA WATER DEPT. (MWRA) has 18 EPA violation(s) on record, with the most recent in 2016. Violation types include MR, TT, MCL. 17 are health-based violations.
How many people does CHELSEA WATER DEPT. (MWRA) serve?
CHELSEA WATER DEPT. (MWRA) serves approximately 38,319 people, Massachusetts. The system provides water to 1 community: Chelsea.
What type of water does CHELSEA WATER DEPT. (MWRA) provide?
CHELSEA WATER DEPT. (MWRA) 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 MA3057000.
How does CHELSEA WATER DEPT. (MWRA) compare to other utilities in Massachusetts?
CHELSEA WATER DEPT. (MWRA) scores 11/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Massachusetts state page for a full comparison of water systems.