Coconino County Water Quality

Coconino County, Arizona has a water quality grade of F with a score of 33.6/100, based on EPA Safe Drinking Water Information System data. The county has 83 health-based drinking water violations on record.

Coconino County has 83 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.

Coconino County's water quality score of 33.6/100 is higher than the Arizona state average of 28.6. The average water quality grade across Arizona is F, based on data from 15 counties with available water quality data.

Based on EPA data, Coconino County has a water quality grade of F (33.6/100). 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).

Coconino County has 83 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.

Coconino County ranks #6 out of 15 counties in Arizona by water quality score (1 = best). With a score of 33.6/100, 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.