Is CUCAMONGA VALLEY WATER DISTRICT's water safe to drink?

CUCAMONGA VALLEY WATER DISTRICT's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. Population served: 211,069, over 48,443 connections.

How this compares nationally

2 total violations and 0 health-based ones put CUCAMONGA VALLEY WATER DISTRICT at the 8th percentile nationally for violation burden, rank 11,858 of 12,903.

Against the CA average

CUCAMONGA VALLEY WATER DISTRICT's 0 health-based violations sit within the CA average of 5.8, across 803 systems statewide. See the lead and copper guide for why lead counts differently.

Most recent violation on record

CUCAMONGA VALLEY WATER DISTRICT's most recent violation on record is dated 1987-01-04. Last reported to EPA: 06/22/2026.

What CUCAMONGA VALLEY WATER DISTRICT's record does not cover

This is what CUCAMONGA VALLEY WATER DISTRICT reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 2 logged violations can see. The guide to what this data misses covers that gap.