Oklahoma County Water Quality

Oklahoma County, Oklahoma has a water quality grade of B with a score of 63.8/100, based on EPA Safe Drinking Water Information System data. The county has 38 health-based drinking water violations on record.

Oklahoma County has 38 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.

Oklahoma County's water quality score of 63.8/100 is higher than the Oklahoma state average of 15.8. The average water quality grade across Oklahoma is F, based on data from 77 counties with available water quality data.

Based on EPA data, Oklahoma County has a water quality grade of B (63.8/100). 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).

Oklahoma County has 38 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.

Oklahoma County ranks #4 out of 77 counties in Oklahoma by water quality score (1 = best). With a score of 63.8/100, it falls in the top third of counties statewide. Rankings are based on EPA Safe Drinking Water Information System (SDWIS) data including health-based violations and compliance records.