Is HOLLISTON WATER DEPARTMENT's water safe to drink?
HOLLISTON WATER DEPARTMENT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 15,139, over 5,018 connections.
Ranked against every other system in this dataset
HOLLISTON WATER DEPARTMENT has 155 violations on record in total, 11 of thems health-based - ranking it 1,682th of 12,903 systems by violation count, the 87th percentile nationally.
Against the MA average
MA's 283 covered systems average 7.0 health-based violations each; HOLLISTON WATER DEPARTMENT carries 11, more than typical for the state. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
HOLLISTON WATER DEPARTMENT's most recent violation on record is dated 2024-01-10, with the most recent health-based one dated 2017-01-04. Last reported to EPA: 06/22/2026.
The concern categories on record
HOLLISTON 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)
- Disinfection byproducts - flagged from: TTHM; Total Haloacetic Acids (HAA5)
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 HOLLISTON WATER DEPARTMENT's record does not cover
Everything on this page is HOLLISTON WATER DEPARTMENT'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 HOLLISTON WATER DEPARTMENT's customers' taps is household plumbing, invisible to a system-level record ranked 1,682th of 12,903 by violation count. The guide to what this data misses covers that gap.