Public water system record
Walnut Park Mutual Water Co.
Serves Walnut Park, Los Angeles County, CA · 16,180 people served
Federal records show no health-based violations and 3 monitoring/reporting issues for Walnut Park Mutual Water Co. in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Walnut Park Mutual Water Co. draws water from 3 wells.
- Most recent formal enforcement: compliance order (no penalty) by California, June 2023.
- Record on file since 1998, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 2,839 service lines.
Check whether Walnut Park Mutual Water Co. 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 |
|---|---|---|
|
Carbon tetrachloride
OTHER
|
Jun 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2016 | Resolved |
Full record since 1998
EPA's records for Walnut Park Mutual Water Co. go back to 1998. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 0 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began January 1998, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 1998 | Resolved |
Enforcement actions
California regulators took 2 formal enforcement actions against Walnut Park Mutual Water Co. between 2019 and 2023. The most recent was a compliance order (no penalty) in June 2023.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 9, 2023 | California | Compliance order (no penalty) | 1 violation: Carbon tetrachloride |
| Dec 24, 2019 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
Where the water comes from
Walnut Park Mutual Water Co. draws water from 3 wells. It also has an emergency connection to Metropolitan Water Dist. of So. Cal. 2 other public water systems have emergency connections to Walnut Park Mutual Water Co.
Emergency or part-time connections to
- Metropolitan Water Dist. of So. Cal. La Verne, CA
Annual water quality report
Walnut Park Mutual Water Co. 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.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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 California.
Certified drinking water labs by state EPA guidance for private wells