Is WALNUT VALLEY WATER DISTRICT's water safe to drink?
WALNUT VALLEY WATER DISTRICT has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. It serves 100,941 people through 27,201 service connections.
How this compares nationally
2 total violations and 1 health-based ones put WALNUT VALLEY WATER DISTRICT at the 30th percentile nationally for violation burden, rank 9,073 of 12,903.
How WALNUT VALLEY WATER DISTRICT compares within CA
Among the 803 CA systems in this dataset, the average is 5.8 health-based violations - WALNUT VALLEY WATER DISTRICT's 1 is at or below that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for WALNUT VALLEY WATER DISTRICT is from 1994-01-09 (health-based: 1994-01-09). Last reported to EPA: 06/22/2026.
What kind of problem, specifically
WALNUT VALLEY WATER DISTRICT's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Coliform (TCR)
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What this data is and is not
Everything on this page is WALNUT VALLEY WATER DISTRICT's own reported record under the Safe Drinking Water Act - a regulatory filing, not a sample of your tap. Between the utility's meter and WALNUT VALLEY WATER DISTRICT's customers' taps is household plumbing, invisible to a system-level record ranked 9,073th of 12,903 by violation count. The guide to what this data misses covers that gap.