Public water system record
O'Connor Tract Co-Operative Water Co.
Serves Menlo Park, San Mateo County, CA · 2,789 people served
Federal records show 1 health-based violation and no monitoring/reporting issues for O'Connor Tract Co-Operative Water Co. 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
- 0
Key facts
- O'Connor Tract Co-Operative Water Co. draws water from 2 wells.
- Most recent formal enforcement: compliance order (no penalty) by California, May 2018.
- Record on file since 2000, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 359 service lines.
Check whether O'Connor Tract Co-Operative 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Revised Total Coliform Rule
Treatment technique failure
|
110 | Apr 1, 2018 | Resolved | No |
Full record since 2000
EPA's records for O'Connor Tract Co-Operative Water Co. go back to 2000. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 2 | 0 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 1 | 0 |
Most recent health-based violation before October 19, 2016: Total Coliform, began September 2004, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2000 | Resolved |
Enforcement actions
California regulators took 2 formal enforcement actions against O'Connor Tract Co-Operative Water Co. between 2015 and 2018. The most recent was a compliance order (no penalty) in May 2018.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 15, 2018 | California | Compliance order (no penalty) | 1 violation (1 health-based): Revised Total Coliform Rule |
| Dec 14, 2015 | California | Compliance order (no penalty) | 1 violation: 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
O'Connor Tract Co-Operative Water Co. draws water from 2 wells. It also has emergency connections to City of East Palo Alto and Menlo Park Municipal Water.
Emergency or part-time connections to
- City of East Palo Alto East Palo Alto, CA
- Menlo Park Municipal Water Menlo Park, CA
Annual water quality report
O'Connor Tract Co-Operative 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.
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