Is Commonwealth Utilities Corp (Tinian)'s water safe to drink?
Commonwealth Utilities Corp (Tinian) had a health-based violation within the last five years. The required corrective action was reported, but it happened recently enough to matter. 3,005 people get their water from it, across 733 connections.
Commonwealth Utilities Corp (Tinian)'s record against the rest of the country
Commonwealth Utilities Corp (Tinian) has 17 violations on record in total, 5 of thems health-based - ranking it 3,629th of 12,903 systems by violation count, the 72th percentile nationally.
Against the MP average
MP's 4 covered systems average 13.3 health-based violations each; Commonwealth Utilities Corp (Tinian) carries 5, not more than typical for the state. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
Commonwealth Utilities Corp (Tinian)'s most recent violation on record is dated 2024-07-12, with the most recent health-based one dated 2024-07-12. Last reported to EPA: 06/08/2026.
The concern categories on record
Commonwealth Utilities Corp (Tinian)'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); Groundwater Rule
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 Commonwealth Utilities Corp (Tinian)'s record does not cover
Everything on this page is Commonwealth Utilities Corp (Tinian)'s own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. This record - 5 health-based violations on file for Commonwealth Utilities Corp (Tinian) - stops at the meter and cannot see household plumbing on the other side of it. The guide to what this data misses covers that gap.