What's in WINCHESTER WATER DEPT's water?
WINCHESTER WATER DEPT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 22,970 people get their water from it, across 7,142 connections.
WINCHESTER WATER DEPT's record against the rest of the country
WINCHESTER WATER DEPT has 44 violations on record in total, 4 of thems health-based - ranking it 4,040th of 12,903 systems by violation count, the 69th percentile nationally.
How WINCHESTER WATER DEPT compares within MA
WINCHESTER WATER DEPT's 4 health-based violations sit within the MA average of 7.0, across 283 systems statewide. See the lead and copper guide for why lead counts differently.
Most recent violation on record
The last violation EPA has on record for WINCHESTER WATER DEPT is from 2026-01-01 (health-based: 1997-01-06). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
WINCHESTER WATER DEPT'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 this data is and is not
WINCHESTER WATER DEPT's numbers here come from its own required reporting to EPA under the Safe Drinking Water Act, not from an independent test of your glass of water. This record - 4 health-based violations on file for WINCHESTER WATER DEPT - 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.