Public water system record
Pine Mountain Mutual Water Co.
Serves an area of Mendocino County, CA · 310 people served
Federal records show no health-based violations and 8 monitoring/reporting issues for Pine Mountain Mutual Water Co. 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
- 8
Key facts
- EPA lists 3 wells and 1 surface water intake for Pine Mountain Mutual Water Co., all for emergency, seasonal or other part-time use.
- Most recent formal enforcement: compliance order (no penalty) by California, September 2025.
- Record on file since 1980, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 99 unknown out of 128 service lines.
Check whether Pine Mountain 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 |
|---|---|---|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2024 | Active |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2022 | Active |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2021 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Feb 1, 2018 | Resolved |
|
Nitrite
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
Full record since 1980
EPA's records for Pine Mountain Mutual Water Co. go back to 1980. Before October 19, 2016 they list no health-based violations and 5 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 2 |
| 1990s | 0 | 2 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 0 | 3 |
| 2020s | 0 | 5 |
Enforcement actions
California regulators took 5 formal enforcement actions against Pine Mountain Mutual Water Co. between 2013 and 2025. The most recent was a compliance order (no penalty) in September 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 30, 2025 | California | Compliance order (no penalty) | 2 violations: Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs) |
| Feb 7, 2022 | California | Compliance order (no penalty) | 1 violation: Revised Total Coliform Rule |
| Apr 17, 2019 | California | Compliance order (no penalty) | 2 violations: Nitrate, Nitrite |
| May 21, 2018 | California | Compliance order (no penalty) | 1 violation: Revised Total Coliform Rule |
| Jun 3, 2013 | California | Compliance order (no penalty) | 1 violation: Total Trihalomethanes (TTHMs) |
Where the water comes from
EPA lists 3 wells and 1 surface water intake for Pine Mountain Mutual Water Co., all for emergency, seasonal or other part-time use.
Annual water quality report
Pine Mountain 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 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Pine Mountain Mutual Water Co. for a copy.
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