Public water system record
Guadalupe Valley Mid
Serves Brisbane, San Mateo County, CA · 1,472 people served
Federal records show no health-based violations and no monitoring or reporting issues for Guadalupe Valley Mid 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
- 0
Key facts
- Guadalupe Valley Mid buys its water from San Francisco Regional Water System.
- Most recent formal enforcement: compliance order (no penalty) by California, February 2000.
- Record on file since 1993, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 845 service lines.
Check whether Guadalupe Valley Mid 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, and no monitoring or reporting violations either.
Full record since 1993
EPA's records for Guadalupe Valley Mid go back to 1993. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 3 |
| 2000s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began June 1993, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 1993 | Resolved |
Enforcement actions
California regulators took 2 formal enforcement actions against Guadalupe Valley Mid between 1993 and 2000. The most recent was a compliance order (no penalty) in February 2000.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 9, 2000 | California | Compliance order (no penalty) | 1 violation: Total Coliform |
| Jun 30, 1993 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
Where the water comes from
Guadalupe Valley Mid buys its water from San Francisco Regional Water System. It lists no wells or intakes of its own. It also has an emergency connection to City of Daly City. 1 other public water system has an emergency connection to Guadalupe Valley Mid.
Buys water from
- San Francisco Regional Water System Burlingame, CA
Emergency or part-time connections to
- City of Daly City Daly City, CA
Annual water quality report
Guadalupe Valley Mid 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 California.
Certified drinking water labs by state EPA guidance for private wells