Public water system record
Epcor - Willow Valley/King Street
Serves Mohave Valley and Willow Valley, Mohave County, AZ · 3,408 people served
Federal records show 1 health-based violation and 6 monitoring/reporting issues for Epcor - Willow Valley/King Street in the last ten years. The most serious issue in this window was a resolved Chlorite violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 6
Key facts
- Epcor - Willow Valley/King Street draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
- Record on file since 1988, with 8 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 19 unknown out of 1,690 service lines.
Check whether Epcor - Willow Valley/King Street 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Chlorite
Contaminant limit exceeded
|
210 | Apr 1, 2025 | Resolved | No |
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 |
|
Chlorite
Monitoring and reporting
|
Dec 1, 2022 | Resolved |
|
Chlorite
Monitoring and reporting
|
Jun 1, 2022 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
Full record since 1988
EPA's records for Epcor - Willow Valley/King Street go back to 1988. Before October 19, 2016 they list 8 health-based violations (8 resolved) and 90 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 8 |
| 1990s | 1 | 4 |
| 2000s | 6 | 70 |
| 2010 to October 18, 2016 | 1 | 8 |
| 2020s | 1 | 6 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began January 2012, Resolved.
Show all 8 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jan 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2006 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1999 | Resolved |
What the violations mean
Chlorite
1 incidentTest results for Chlorite were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about this violation.
Where the water comes from
Epcor - Willow Valley/King Street draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Epcor - Willow Valley/King Street 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