Public water system record
San Luis Obispo Water Department
Serves San Luis Obispo, San Luis Obispo County, CA · 47,788 people served
Federal records show no health-based violations and no monitoring or reporting issues for San Luis Obispo Water Department 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
- San Luis Obispo Water Department draws water from 3 surface water intakes.
- Most recent formal enforcement: compliance order (no penalty) by California, July 2015.
- Record on file since 2015, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 18,792 service lines.
Check whether San Luis Obispo Water Department 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 2015
EPA's records for San Luis Obispo Water Department go back to 2015. Before October 19, 2016 they list 1 health-based violation (1 resolved) and no monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2010 to October 18, 2016 | 1 | 0 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2015, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Apr 1, 2015 | Resolved |
Enforcement actions
California regulators took 1 formal enforcement action against San Luis Obispo Water Department in 2015. The most recent was a compliance order (no penalty) in July 2015.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jul 17, 2015 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
Where the water comes from
San Luis Obispo Water Department draws water from 3 surface water intakes. It also buys water from Nacimiento Water Project. 1 smaller public system such as schools, businesses or campgrounds buys water from San Luis Obispo Water Department.
Buys water from
- Nacimiento Water Project San Luis Obispo, CA
Annual water quality report
San Luis Obispo Water Department 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 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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