What's in DENNIS WATER DISTRICT's water?
DENNIS WATER DISTRICT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. Population served: 65,000, over 14,626 connections.
DENNIS WATER DISTRICT's record against the rest of the country
DENNIS WATER DISTRICT has 40 violations on record in total, 5 of thems health-based - ranking it 3,471th of 12,903 systems by violation count, the 73th percentile nationally.
How DENNIS WATER DISTRICT compares within MA
DENNIS WATER DISTRICT's 5 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 DENNIS WATER DISTRICT is from 2014-01-01 (health-based: 2006-01-12). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
DENNIS WATER DISTRICT'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
Everything on this page is DENNIS WATER DISTRICT'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 40 logged violations can see. The guide to what this data misses covers that gap.