City of Bay St Louis

Water Quality Snapshot: City of Bay St Louis

City of Bay St Louis is a local-owned community water system that delivers drinking water to 9,284 residents in Bay St Louis, Mississippi (Hancock County) through 3,847 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 735 total violations for this system , of which 25 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 682 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Combined Uranium, recorded in 208 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Mississippi, EPA tracks 1,185 public water systems serving 3,286,781 people, with 499,292 cumulative violations and 10,292 health-based violations on record. About 96% of systems in the state carry at least one violation, and state-wide the average per system is 421.3 violations. Statewide, 160 of 238 UCMR5-tested systems have reported PFAS detections (67.2%).

City of Bay St Louis's 735 violations sit above the Mississippi average.

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