Charleston County Water Quality

Charleston County, South Carolina has a water quality grade of B with a score of 63.2/100, based on EPA Safe Drinking Water Information System data. The county has 22 health-based drinking water violations on record.

Charleston County has 22 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.

Charleston County's water quality score of 63.2/100 is lower than the South Carolina state average of 64.9. The average water quality grade across South Carolina is C, based on data from 46 counties with available water quality data.

Based on EPA data, Charleston County has a water quality grade of B (63.2/100). This indicates good to excellent water quality with strong compliance. For the most up-to-date information, contact your local water utility or review your Consumer Confidence Report (CCR).

Charleston County has 22 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.

Charleston County ranks #28 out of 46 counties in South Carolina by water quality score (1 = best). With a score of 63.2/100, 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.