Public water system record
Mission Highlands Mutual Water Co.
Serves an area of Sonoma County, CA · 150 people served
Federal records show no health-based violations and 5 monitoring/reporting issues for Mission Highlands 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
- 5
Key facts
- Mission Highlands Mutual Water Co. draws water from 3 wells.
- Most recent formal enforcement: compliance order (no penalty) by California, March 2022.
- Record on file since 1980, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 68 service lines.
Check whether Mission Highlands 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 |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
May 1, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
Full record since 1980
EPA's records for Mission Highlands Mutual Water Co. go back to 1980. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 5 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 5 |
| 2000s | 1 | 0 |
| October 19, 2016 to 2019 | 0 | 4 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 2001, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2001 | Resolved |
Enforcement actions
California regulators took 4 formal enforcement actions against Mission Highlands Mutual Water Co. between 2001 and 2022. The most recent was a compliance order (no penalty) in March 2022.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 23, 2022 | California | Compliance order (no penalty) | 2 violations: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
| Jun 29, 2021 | California | Compliance order (no penalty) | 1 violation: Revised Total Coliform Rule |
| Feb 20, 2020 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Aug 23, 2001 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
Where the water comes from
Mission Highlands Mutual Water Co. draws water from 3 wells.
Annual water quality report
Mission Highlands 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 Mission Highlands 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