B61/100
LEXINGTON WATER DEPT. (MWRA) — Water Quality Report 2026
Serving 34,074 people · Massachusetts
Water Source
Purchased Surface Water
County
—
System ID
MA3155000
Violations
8
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
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2024Rule: Ground Water RuleEnforcement: Formal — state order issued
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 LEXINGTON WATER DEPT. (MWRA)
Is LEXINGTON WATER DEPT. (MWRA) water safe to drink?
LEXINGTON WATER DEPT. (MWRA) water receives a grade of B (61/100), which is considered good. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has LEXINGTON WATER DEPT. (MWRA) detected?
69 contaminants were tested in LEXINGTON WATER DEPT. (MWRA)'s water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does LEXINGTON WATER DEPT. (MWRA) have any EPA violations?
Yes, LEXINGTON WATER DEPT. (MWRA) has 8 EPA violation(s) on record, with the most recent in 2024. Violation types include MR, TT, MCL. 7 are health-based violations.
How many people does LEXINGTON WATER DEPT. (MWRA) serve?
LEXINGTON WATER DEPT. (MWRA) serves approximately 34,074 people, Massachusetts. The system provides water to 1 community: Lexington.
What type of water does LEXINGTON WATER DEPT. (MWRA) provide?
LEXINGTON 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 MA3155000.
How does LEXINGTON WATER DEPT. (MWRA) compare to other utilities in Massachusetts?
LEXINGTON WATER DEPT. (MWRA) scores 61/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Massachusetts state page for a full comparison of water systems.