Public water system record
Epcor - Willow Valley/Lake Cimarron
Serves Mohave Valley, Mohave County, AZ · 596 people served
Federal records show 1 health-based violation and 5 monitoring/reporting issues for Epcor - Willow Valley/Lake Cimarron in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 5
Key facts
- Epcor - Willow Valley/Lake Cimarron draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit), 2017.
- Record on file since 1998, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 235 service lines.
Check whether Epcor - Willow Valley/Lake Cimarron 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 |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jan 1, 2017 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Chlorite
Monitoring and reporting
|
Mar 1, 2023 | Resolved |
|
Chlorite
Monitoring and reporting
|
Dec 1, 2022 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Feb 1, 2022 | Resolved |
|
Chlorine dioxide
Monitoring and reporting
|
Jul 1, 2020 | Resolved |
|
Chlorite
Monitoring and reporting
|
Jul 1, 2020 | Resolved |
Full record since 1998
EPA's records for Epcor - Willow Valley/Lake Cimarron go back to 1998. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 97 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 55 |
| 2000s | 2 | 36 |
| 2010 to October 18, 2016 | 0 | 6 |
| October 19, 2016 to 2019 | 1 | 0 |
| 2020s | 0 | 5 |
Most recent health-based violation before October 19, 2016: Total Coliform, began June 2008, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1999 | Resolved |
What the violations mean
Total Trihalomethanes (TTHMs)
1 incidentDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
Epcor - Willow Valley/Lake Cimarron draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Epcor - Willow Valley/Lake Cimarron 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