Public water system record
Diamond Valley Water District
Serves an area of Yavapai County, AZ that includes Prescott · 2,000 people served
Federal records show no health-based violations and 6 monitoring/reporting issues for Diamond Valley Water District in the last ten years. At least one of these issues remains unresolved.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 6
Key facts
- Diamond Valley Water District buys its water from Town of Prescott Valley.
- Most recent enforcement action: ban on new connections or service extensions by Arizona, May 1986.
- Record on file since 1979, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 297 unknown out of 807 service lines.
Check whether Diamond Valley Water District serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Jul 2, 2025 | Active |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2017 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
Full record since 1979
EPA's records for Diamond Valley Water District go back to 1979. Before October 19, 2016 they list 1 health-based violation (1 archived by EPA without a recorded fix) and 70 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 8 |
| 1980s | 1 | 1 |
| 1990s | 0 | 2 |
| 2000s | 0 | 41 |
| 2010 to October 18, 2016 | 0 | 18 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 0 | 4 |
Most recent health-based violation before October 19, 2016: Gross Alpha, Excl. Radon and U, began November 1989, Archived.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Nov 27, 1989 | Archived |
Enforcement actions
Arizona regulators issued 1 ban on new connections to Diamond Valley Water District in 1986. The most recent was a ban on new connections or service extensions in May 1986.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 30, 1986 | Arizona | Ban on new connections or service extensions | 1 violation |
Where the water comes from
Diamond Valley Water District buys its water from Town of Prescott Valley. It lists no wells or intakes of its own.
Buys water from
- Town of Prescott Valley Dewey, AZ
Annual water quality report
Diamond Valley Water District must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Arizona.
Certified drinking water labs by state EPA guidance for private wells