HUMBOLDT, AZ · Yavapai County
DIAMOND VALLEY WATER DISTRICT Water System
Consumer Confidence Report status
DIAMOND VALLEY WATER DISTRICT must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for DIAMOND VALLEY WATER DISTRICT.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Arizona’s official records. Always confirm current status with Arizona before making decisions based on this information.
System facts
- System ID (PWSID)
- AZ0413017
- System type
- Community Water System
- Population served
- 2,000
- Service connections
- 775
- Ownership
- privately owned
- Water source
- groundwater (wells)
DIAMOND VALLEY WATER DISTRICT is one of 272 community water systems in Arizona in the 501 to 3,300 people size category, serving 2,000 people from groundwater.
As of August 1, 2026, its federal record holds 3 entries between 1979 and 1989, all of which EPA lists as closed. Nothing has been added since 1989.
Of the 3, 2 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Radionuclides and Revised Rad Rule and inorganic chemicals.
Violation history
Maximum Contaminant Level Violation, Single Sample
Health-basedGross Alpha, Excl. Radon and U
November 27, 1989 – November 26, 1993
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
October 1, 1989 – December 31, 1989
ArchivedMonitoring, Regular
—Chromium
June 24, 1979 – June 23, 1982
Archived
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| November 27, 1989 – November 26, 1993 | Maximum Contaminant Level Violation, Single Sample | Gross Alpha, Excl. Radon and U | Health-based | Archived |
| October 1, 1989 – December 31, 1989 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
| June 24, 1979 – June 23, 1982 | Monitoring, Regular | Chromium | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- April 15, 2016State Compliance achieved16 linked violations
- September 6, 1992State Bilateral Compliance Agreement signed984 linked violations
Common questions
Is DIAMOND VALLEY WATER DISTRICT required to publish a Consumer Confidence Report?
- Yes. DIAMOND VALLEY WATER DISTRICT is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is DIAMOND VALLEY WATER DISTRICT’s next Consumer Confidence Report due?
- DIAMOND VALLEY WATER DISTRICT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does DIAMOND VALLEY WATER DISTRICT have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for DIAMOND VALLEY WATER DISTRICT.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
CHARLES, DENNIS M
928-458-5059
HUMBOLDT, AZ 86327