HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE: EPA violation history, explained
HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 35,000 people through 7,577 service connections.
HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE's record against the rest of the country
HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE has 43 violations on record in total, 6 of thems health-based - ranking it 3,001th of 12,903 systems by violation count, the 77th percentile nationally.
How HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE compares within MA
MA's 283 covered systems average 7.0 health-based violations each; HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE carries 6, not more than typical for the state. The filter guide explains what a violation like this actually calls for.
Most recent violation on record
The last violation EPA has on record for HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE is from 2017-11-07 (health-based: 2009-01-08). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE'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 this data is and is not
HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE'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. Between the utility's meter and HYANNIS WATER SYSTEM, TOWN OF BARNSTABLE's customers' taps is household plumbing, invisible to a system-level record ranked 3,001th of 12,903 by violation count. The guide to what this data misses covers that gap.