Eagle Butte

Water Quality Snapshot: Eagle Butte

Eagle Butte is a local-owned community water system that delivers drinking water to 4,000 residents in Eagle Butte, South Dakota (Dewey County) through 900 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 64 total violations for this system , of which 6 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 34 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 Public Notice, recorded in 8 violations (Other). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across South Dakota, EPA tracks 654 public water systems serving 915,901 people, with 56,254 cumulative violations and 8,399 health-based violations on record. About 92% of systems in the state carry at least one violation, and state-wide the average per system is 86 violations. Statewide, 42 of 49 UCMR5-tested systems have reported PFAS detections (85.7%).

Eagle Butte's 64 violations sit below the South Dakota average.

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