Flathead County Water Quality

Flathead County, Montana has a water quality grade of C with a score of 55.0/100, based on EPA Safe Drinking Water Information System data. The county has 8 health-based drinking water violations on record.

Flathead County has 8 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.

Flathead County's water quality score of 55.0/100 is higher than the Montana state average of 48.9. The average water quality grade across Montana is D, based on data from 55 counties with available water quality data.

Based on EPA data, Flathead County has a water quality grade of C (55.0/100). This indicates moderate water quality. Some violations have been recorded but overall compliance is maintained. For the most up-to-date information, contact your local water utility or review your Consumer Confidence Report (CCR).

Flathead County has 8 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.

Flathead County ranks #24 out of 55 counties in Montana by water quality score (1 = best). With a score of 55.0/100, 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.