B75/100
ARLINGTON WATER DEPT. (MWRA) — Water Quality Report 2026
Serving 46,308 people · Massachusetts
Water Source
Purchased Surface Water
County
—
System ID
MA3010000
Violations
6
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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 ARLINGTON WATER DEPT. (MWRA)
Is ARLINGTON WATER DEPT. (MWRA) water safe to drink?
ARLINGTON WATER DEPT. (MWRA) water receives a grade of B (75/100), 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 ARLINGTON WATER DEPT. (MWRA) detected?
69 contaminants were tested in ARLINGTON WATER DEPT. (MWRA)'s water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does ARLINGTON WATER DEPT. (MWRA) have any EPA violations?
Yes, ARLINGTON WATER DEPT. (MWRA) has 6 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, TT. 4 are health-based violations.
How many people does ARLINGTON WATER DEPT. (MWRA) serve?
ARLINGTON WATER DEPT. (MWRA) serves approximately 46,308 people, Massachusetts. The system provides water to 1 community: Arlington.
What type of water does ARLINGTON WATER DEPT. (MWRA) provide?
ARLINGTON 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 MA3010000.
How does ARLINGTON WATER DEPT. (MWRA) compare to other utilities in Massachusetts?
ARLINGTON WATER DEPT. (MWRA) scores 75/100 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.