Custer County Water Quality

Custer County, South Dakota has a water quality grade of F with a score of 17.0/100, based on EPA Safe Drinking Water Information System data. The county has 5 health-based drinking water violations on record.

Custer County has 5 health-based drinking water violations recorded by the EPA. Health-based violations indicate instances where contaminant levels exceeded EPA Maximum Contaminant Levels (MCLs). Violations may have been resolved — check with your local water utility for current status.

Custer County's water quality score of 17.0/100 is lower than the South Dakota state average of 56.8. The average water quality grade across South Dakota is D, based on data from 63 counties with available water quality data.

Based on EPA data, Custer County has a water quality grade of F (17.0/100). This indicates below-average water quality with significant compliance issues. Residents may want to consider home water filtration. For the most up-to-date information, contact your local water utility or review your Consumer Confidence Report (CCR).

Custer County has 5 health-based drinking water violations according to EPA records. With a water quality score of 17.0/100 and grade F, the county's drinking water has had some compliance issues but continues to be monitored. For the most current safety information, check with your local water utility.

Custer County ranks #58 out of 63 counties in South Dakota by water quality score (1 = best). With a score of 17.0/100, it falls in the bottom third of counties statewide. Rankings are based on EPA Safe Drinking Water Information System (SDWIS) data including health-based violations and compliance records.