Pennington County Water Quality

Pennington County, South Dakota has a water quality grade of F with a score of 41.3/100, based on EPA Safe Drinking Water Information System data. The county has 36 health-based drinking water violations on record.

Pennington County has 36 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.

Pennington County's water quality score of 41.3/100 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, Pennington County has a water quality grade of F (41.3/100). 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).

Pennington County has 36 health-based drinking water violations on record from the EPA SDWIS database. A higher violation count can result from aging infrastructure, underfunded water utilities, agricultural runoff contamination, or industrial pollution. Counties with more water systems may also see more violations simply due to scale. Residents concerned about water quality should consider independent water testing and home filtration systems.

Pennington County ranks #39 out of 63 counties in South Dakota by water quality score (1 = best). With a score of 41.3/100, it falls in the middle third of counties statewide. Rankings are based on EPA Safe Drinking Water Information System (SDWIS) data including health-based violations and compliance records.