HOPKINTON WATER DEPARTMENT: EPA violation history, explained
HOPKINTON WATER DEPARTMENT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 12,680 people get their water from it, across 4,405 connections.
How this compares nationally
10 total violations and 5 health-based ones put HOPKINTON WATER DEPARTMENT at the 71th percentile nationally for violation burden, rank 3,742 of 12,903.
Against the MA average
MA's 283 covered systems average 7.0 health-based violations each; HOPKINTON WATER DEPARTMENT carries 5, not more than typical for the state. See the lead and copper guide for why lead counts differently.
Most recent violation on record
HOPKINTON WATER DEPARTMENT's most recent violation on record is dated 2014-01-04, with the most recent health-based one dated 2008-01-09. Last reported to EPA: 06/22/2026.
The concern categories on record
HOPKINTON 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)
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 HOPKINTON WATER DEPARTMENT's record does not cover
Everything on this page is HOPKINTON WATER DEPARTMENT's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 10 logged violations can see. The guide to what this data misses covers that gap.