Is BOSTON WATER AND SEWER COMMISSION (MWRA)'s water safe to drink?
BOSTON WATER AND SEWER COMMISSION (MWRA) has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 675,647, over 88,895 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, BOSTON WATER AND SEWER COMMISSION (MWRA) ranks 4,530th by violation burden (65th percentile) - 6 violations total, 4 health-baseds.
How BOSTON WATER AND SEWER COMMISSION (MWRA) compares within MA
Among the 283 MA systems in this dataset, the average is 7.0 health-based violations - BOSTON WATER AND SEWER COMMISSION (MWRA)'s 4 is at or below that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for BOSTON WATER AND SEWER COMMISSION (MWRA) is from 2020-01-11 (health-based: 2020-01-11). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
BOSTON WATER AND SEWER COMMISSION (MWRA)'s flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Lead & copper - flagged from: Lead and Copper Rule
- Microbial contamination / treatment technique - flagged from: Coliform (TCR); Surface Water Treatment Rule
The most severe category on record is lead & copper, which points toward a lead-class filter if you want to address it directly.
What this data is and is not
Everything on this page is BOSTON WATER AND SEWER COMMISSION (MWRA)'s own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and BOSTON WATER AND SEWER COMMISSION (MWRA)'s customers' taps is household plumbing, invisible to a system-level record ranked 4,530th of 12,903 by violation count. The guide to what this data misses covers that gap.