Public water system record
Redwood Terrace Mutual
Serves an area of San Mateo County, CA · 56 people served
Federal records show 1 health-based violation and 2 monitoring/reporting issues for Redwood Terrace Mutual in the last ten years. The most serious issue in this window was a resolved Revised Total Coliform Rule violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 1
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 2
Key facts
- Redwood Terrace Mutual draws water from 1 well and 1 spring.
- Most recent formal enforcement: compliance order (no penalty) by California, May 2025.
- Record on file since 1980, with 2 health-based violations before October 20, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 17 service lines.
Check whether Redwood Terrace Mutual 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 |
|---|---|---|---|---|
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Jun 1, 2019 | 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
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Nitrate-Nitrite
Monitoring and reporting
|
Jan 1, 2019 | Resolved |
Full record since 1980
EPA's records for Redwood Terrace Mutual go back to 1980. Before October 20, 2016 they list 2 health-based violations (1 resolved, 1 archived by EPA without a recorded fix) and 67 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 1 | 4 |
| 1990s | 0 | 5 |
| 2000s | 1 | 57 |
| 2010 to October 19, 2016 | 0 | 1 |
| October 20, 2016 to 2019 | 1 | 1 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 20, 2016: Total Coliform, began November 2002, Resolved.
Show all 2 health-based violations before October 20, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2002 | Resolved |
|
Mercury
Contaminant limit exceeded
|
Jun 1, 1980 | Archived |
Enforcement actions
California regulators took 3 formal enforcement actions against Redwood Terrace Mutual and issued 1 boil water order between 2002 and 2025. The most recent was a compliance order (no penalty) in May 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 29, 2025 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Feb 25, 2020 | California | Compliance order (no penalty) | 1 violation: Nitrate-Nitrite |
| Jul 17, 2019 | California | Compliance order (no penalty) | 1 violation (1 health-based): Revised Total Coliform Rule |
| Dec 11, 2002 | California | Boil water order | 1 violation (1 health-based): Total Coliform |
What the violations mean
Revised Total Coliform Rule
1 incidentThe system did not meet a requirement of the Revised Total Coliform Rule
Coliform and E. coli rules protect against bacteria in the distribution system
Where the water comes from
Redwood Terrace Mutual draws water from 1 well and 1 spring.
Annual water quality report
Redwood Terrace Mutual 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 Redwood Terrace Mutual 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