Block Island Water Company, RI Water Quality
Is Block Island Water Company's water safe to drink?
Block Island Water Company has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 9,999 people through 338 service connections.
Block Island Water Company's record against the rest of the country
77 total violations and 7 health-based ones put Block Island Water Company at the 80th percentile nationally for violation burden, rank 2,579 of 12,903.
How Block Island Water Company compares within RI
Block Island Water Company's 7 health-based violations sit above the RI average of 5.6, across 33 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 Block Island Water Company is from 2023-01-07 (health-based: 1995-01-04). Last reported to EPA: 05/26/2026.
What kind of problem, specifically
Block Island Water Company'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
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
Block Island Water Company'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 Block Island Water Company's customers' taps is household plumbing, invisible to a system-level record ranked 2,579th of 12,903 by violation count. The guide to what this data misses covers that gap.