Public water system record
Mustang Springs Mutual Water
Serves an area of San Luis Obispo County, CA · 30 people served
Federal records show 2 health-based violations and no monitoring/reporting issues for Mustang Springs Mutual Water in the last ten years. The most serious issue in this window was a resolved Fluoride violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Mustang Springs Mutual Water draws water from 1 well.
- Most recent formal enforcement: compliance order (no penalty) by California, July 2016.
- Record on file since 1993, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 16 service lines.
Check whether Mustang Springs Mutual Water 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 |
|---|---|---|---|---|
|
Fluoride
Contaminant limit exceeded
|
330 | Oct 1, 2022 | Resolved | No |
|
Fluoride
Contaminant limit exceeded
|
330 | Jul 1, 2022 | Resolved | No |
Full record since 1993
EPA's records for Mustang Springs Mutual Water go back to 1993. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 1 |
| 2000s | 0 | 3 |
| 2010 to October 18, 2016 | 1 | 0 |
| 2020s | 2 | 0 |
Most recent health-based violation before October 19, 2016: Fluoride, began July 2016, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Fluoride
Contaminant limit exceeded
|
Jul 1, 2016 | Resolved |
Enforcement actions
California regulators took 1 formal enforcement action against Mustang Springs Mutual Water in 2016. The most recent was a compliance order (no penalty) in July 2016.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jul 26, 2016 | California | Compliance order (no penalty) | 3 violations (3 health-based): Fluoride |
What the violations mean
Fluoride
2 incidentsFluoride exceeded the federal limit
Excessive fluoride can cause dental and skeletal fluorosis
Where the water comes from
Mustang Springs Mutual Water draws water from 1 well.
Annual water quality report
Mustang Springs Mutual Water 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 Mustang Springs Mutual Water 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 California.
Certified drinking water labs by state EPA guidance for private wells