Boise, ID Tap Water Quality

The drinking water in Boise, ID generally meets all federal health standards, earning a solid B grade with a composite safety score of 71/100 across 32 ZIP codes. While the primary water utility, Veolia Water Idaho, maintains adequate compliance with EPA regulations, there have been minor or administrative violations on record. Overall, residents receive safe tap water that is actively monitored by Idaho Department of Environmental Quality.

The accumulation of 96 health-based violations over the past 5 years highlights systemic challenges within Boise's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by Idaho Department of Environmental Quality. The city relies on surface water, which may require significant treatment upgrades to address these recurring issues.

Additionally, lead exposure risk remains a critical issue for certain neighborhoods. EPA data indicates that 4 out of 32 ZIP codes in Boise are rated as High or Very High risk for lead. This risk is often driven by aging homes with pre-1986 plumbing containing lead solder or service lines. Families in these areas should test their tap water and consider NSF/ANSI 53 certified filters.