DIAMOND VALLEY WATER DISTRICT: EPA violation history, explained
DIAMOND 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. 2,000 people get their water from it, across 775 connections.
Ranked against every other system in this dataset
Out of 12,903 systems in this dataset, DIAMOND VALLEY WATER DISTRICT ranks 7,310th by violation burden (43th percentile) - 78 violations total, 1 health-based.
How DIAMOND VALLEY WATER DISTRICT compares within AZ
DIAMOND VALLEY WATER DISTRICT's 1 health-based violations sit within the AZ average of 8.2, across 199 systems statewide. 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 DIAMOND VALLEY WATER DISTRICT is from 2025-02-07 (health-based: 1991-03-11). Last reported to EPA: 05/14/2026.
What kind of problem, specifically
DIAMOND 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:
- Radionuclides - flagged from: Gross Alpha, Excl. Radon and U
The most severe category on record is radionuclides, which points toward a reverse osmosis-class filter if you want to address it directly.
What this data is and is not
Everything on this page is DIAMOND 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 DIAMOND VALLEY WATER DISTRICT's customers' taps is household plumbing, invisible to a system-level record ranked 7,310th of 12,903 by violation count. The guide to what this data misses covers that gap.