D20/100
DIAMOND VALLEY WATER DISTRICT — Water Quality Report 2026
Serving 2,000 people · Arizona
Water Source
Purchased Groundwater
County
—
System ID
AZ0413017
Violations
76
Contaminant Test Results
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2023 – June 30, 2023Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2023 – March 31, 2023Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About DIAMOND VALLEY WATER DISTRICT
Is DIAMOND VALLEY WATER DISTRICT water safe to drink?
DIAMOND VALLEY WATER DISTRICT water receives a grade of D (20/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 76 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has DIAMOND VALLEY WATER DISTRICT detected?
1 contaminants were tested in DIAMOND VALLEY WATER DISTRICT's water. No contaminants exceed EPA legal limits or health goals, indicating good water quality management.
Does DIAMOND VALLEY WATER DISTRICT have any EPA violations?
Yes, DIAMOND VALLEY WATER DISTRICT has 76 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, MON, Other. 1 are health-based violations.
How many people does DIAMOND VALLEY WATER DISTRICT serve?
DIAMOND VALLEY WATER DISTRICT serves approximately 2,000 people, Arizona. The system provides water to 1 community: Prescott.
What type of water does DIAMOND VALLEY WATER DISTRICT provide?
DIAMOND VALLEY WATER DISTRICT sources its water from purchased groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is AZ0413017.
How does DIAMOND VALLEY WATER DISTRICT compare to other utilities in Arizona?
DIAMOND VALLEY WATER DISTRICT scores 20/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Arizona state page for a full comparison of water systems.