Public water system record
Atascadero Mutual Water Co
Serves Atascadero, San Luis Obispo County, CA · 30,618 people served
Federal records show no health-based violations and no monitoring or reporting issues for Atascadero Mutual Water Co 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
- Atascadero Mutual Water Co draws water from 16 wells (1 of them for emergency, seasonal or other part-time use).
- Record on file since 1993, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 10,942 service lines.
Check whether Atascadero Mutual 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.
None since October 2016, and no monitoring or reporting violations either.
Full record since 1993
EPA's records for Atascadero Mutual Water Co go back to 1993. 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 |
|---|---|---|
| 1990s | 1 | 0 |
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 |
Where the water comes from
Atascadero Mutual Water Co draws water from 16 wells (1 of them for emergency, seasonal or other part-time use). It also has an emergency connection to Nacimiento Water Project. 2 other public water systems have emergency connections to Atascadero Mutual Water Co.
Emergency or part-time connections to
- Nacimiento Water Project San Luis Obispo, CA
Annual water quality report
Atascadero Mutual 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.
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