Mayaguez

Water Quality Snapshot: Mayaguez

Mayaguez is a local-owned community water system that delivers drinking water to 151,555 residents in Mayaguez, Puerto Rico (Mayaguez Municipio County) through 56,762 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 1,188 total violations for this system , of which 193 (16%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 967 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Surface Water Treatment Rule, recorded in 82 violations (TT, health-based). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Puerto Rico, EPA tracks 458 public water systems serving 3,328,141 people, with 164,144 cumulative violations and 34,657 health-based violations on record. About 100% of systems in the state carry at least one violation, and state-wide the average per system is 358.4 violations. Statewide, 40 of 99 UCMR5-tested systems have reported PFAS detections (40.4%).

Mayaguez's 1,188 violations sit above the Puerto Rico average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.