Chico, CA Tap Water Quality

The drinking water in Chico, CA generally meets all federal health standards, earning a solid B grade with a composite safety score of 83/100 across 6 ZIP codes. While the primary water utility, Del Oro Water Company-paradise Pines, 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 California State Water Resources Control Board.

The accumulation of 24 health-based violations over the past 5 years highlights systemic challenges within Chico's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by California State Water Resources Control Board. The city relies on surface water, which may require significant treatment upgrades to address these recurring issues.

Fortunately, the modeled risk for widespread lead exposure in Chico's municipal water is relatively low compared to national averages. However, because lead typically enters drinking water through the corrosion of older, individual home plumbing rather than the main supply lines, residents in homes built before 1986 should still exercise caution by running the tap before use.