Public water system record
La Posta Upper
On record as serving San Diego County, CA · Serves 73 people
Federal records show 4 health-based violations and 7 monitoring/reporting issues for La Posta Upper in the last ten years. The most serious issue in this window was a resolved Nitrate violation.
System profile
- Health-based violations, last 10 years
- 4
- Resolved
- 4
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 7
Key facts
- La Posta Upper draws water from 2 wells.
- Highest measured level in the last 10 years: Nitrate, 11.5 mg/L, federal limit 10 mg/L (1.2 times the limit), 2023.
- Record on file since 2000, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 15 service lines.
Check whether La Posta Upper 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 |
|---|---|---|---|---|
|
Nitrate
Contaminant limit exceeded
Measured 11.5 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jan 1, 2023 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Jul 1, 2021 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Jan 1, 2021 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Apr 1, 2020 | Resolved | Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Combined Uranium
Monitoring and reporting
|
Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Nitrate
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2016 | Resolved |
Full record since 2000
EPA's records for La Posta Upper go back to 2000. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 78 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 1 | 77 |
| 2010 to October 18, 2016 | 0 | 1 |
| 2020s | 4 | 6 |
Most recent health-based violation before October 19, 2016: Total Coliform, began August 2005, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2005 | Resolved |
What the violations mean
Nitrate
4 incidentsNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Where the water comes from
La Posta Upper draws water from 2 wells. It also has an emergency connection to La Posta Lower Community. 1 other public water system has a seasonal connection to La Posta Upper.
Emergency or part-time connections to
- La Posta Lower Community Boulevard, CA
Annual water quality report
La Posta Upper 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 La Posta Upper 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 EPA Region 9.
Certified drinking water labs by state EPA guidance for private wells