What's in CAMBRIDGE WATER DEPARTMENT's water?
CAMBRIDGE WATER DEPARTMENT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 118,214 people get their water from it, across 15,001 connections.
Ranked against every other system in this dataset
67 total violations and 2 health-based ones put CAMBRIDGE WATER DEPARTMENT at the 55th percentile nationally for violation burden, rank 5,848 of 12,903.
Against the MA average
MA's 283 covered systems average 7.0 health-based violations each; CAMBRIDGE WATER DEPARTMENT carries 2, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
CAMBRIDGE WATER DEPARTMENT's most recent violation on record is dated 2019-01-04, with the most recent health-based one dated 1994-01-08. Last reported to EPA: 06/22/2026.
The concern categories on record
CAMBRIDGE WATER DEPARTMENT'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:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR); Surface Water Treatment Rule
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What CAMBRIDGE WATER DEPARTMENT's record does not cover
This is what CAMBRIDGE WATER DEPARTMENT reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. This record - 2 health-based violations on file for CAMBRIDGE WATER DEPARTMENT - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.