Public water system record
Lopez Project
Serves San Luis Obispo and Edna, San Luis Obispo County, CA · 1,569 people served
Federal records show 1 health-based violation and no monitoring/reporting issues for Lopez Project 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
- Yes
- Monitoring issues, last 10 years
- 0
Key facts
- Lopez Project draws water from 3 surface water intakes.
- Most recent formal enforcement: compliance order (no penalty) by California, May 2025.
- Record on file since 1993, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 33 service lines.
Check whether Lopez Project 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
Contaminant limit exceeded
|
110 | Apr 1, 2025 | Resolved | Yes |
Full record since 1993
EPA's records for Lopez Project go back to 1993. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 1 |
| 2000s | 1 | 0 |
| 2020s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Total Coliform, began August 2008, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2008 | Resolved |
Enforcement actions
California regulators took 2 formal enforcement actions against Lopez Project between 2008 and 2025. The most recent was a compliance order (no penalty) in May 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 7, 2025 | California | Compliance order (no penalty) | 1 violation (1 health-based): Revised Total Coliform Rule |
| Sep 4, 2008 | California | Compliance order (no penalty) | 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
Lopez Project draws water from 3 surface water intakes. It also buys water from Central Coast Water Authority. 6 other community water systems and 1 smaller public system such as schools, businesses or campgrounds buy water from Lopez Project.
Buys water from
- Central Coast Water Authority Buellton, CA
Community systems that buy water from it
- Avila Beach Community Services District Avila Beach, CA
- Avila Valley Mutual Water Co San Luis Obispo, CA
- City of Arroyo Grande Utilities Division Arroyo Grande, CA
- City of Grover Beach Public Works Dept Grover Beach, CA
- Oceano Comm Services Dist. Oceano, CA
- Pismo Beach Water Department Pismo Beach, CA
Annual water quality report
Lopez Project 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