What's in ONSET FIRE DISTRICTWATER DEPT.'s water?
ONSET FIRE DISTRICTWATER DEPT. has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 5,392 people get their water from it, across 2,982 connections.
How this compares nationally
ONSET FIRE DISTRICTWATER DEPT. has 47 violations on record in total, 9 of thems health-based - ranking it 2,109th of 12,903 systems by violation count, the 84th percentile nationally.
How ONSET FIRE DISTRICTWATER DEPT. compares within MA
ONSET FIRE DISTRICTWATER DEPT.'s 9 health-based violations sit above 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 ONSET FIRE DISTRICTWATER DEPT. is from 2022-01-07 (health-based: 2019-01-05). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
ONSET FIRE DISTRICTWATER 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); Revised Total Coliform 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
Everything on this page is ONSET FIRE DISTRICTWATER DEPT.'s own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 9 health-based violations on file for ONSET FIRE DISTRICTWATER 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.