COQUI: EPA violation history, explained

COQUI has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 6,237 people get their water from it, across 2,336 connections.

COQUI's record against the rest of the country

152 total violations and 14 health-based ones put COQUI at the 90th percentile nationally for violation burden, rank 1,296 of 12,903.

Against the PR average

PR's 103 covered systems average 46.1 health-based violations each; COQUI carries 14, not more than typical for the state. See the lead and copper guide for why lead counts differently.

Most recent violation on record

COQUI's most recent violation on record is dated 2025-01-10, with the most recent health-based one dated 2011-01-12. Last reported to EPA: 06/05/2026.

The concern categories on record

COQUI'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 COQUI's record does not cover

Everything on this page is COQUI'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 152 logged violations can see. The guide to what this data misses covers that gap.