Public water system record
South Mesa WC
Serves Yucaipa and Calimesa, Riverside County and San Bernardino County, CA · 10,108 people served
Federal records show no health-based violations and no monitoring or reporting issues for South Mesa WC 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
- South Mesa WC draws water from 8 wells.
- Most recent formal enforcement: compliance order (no penalty) by California, October 2014.
- Record on file since 1989, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 3,056 service lines.
Check whether South Mesa WC 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 1989
EPA's records for South Mesa WC go back to 1989. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 6 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 1 |
| 1990s | 0 | 1 |
| 2000s | 0 | 2 |
| 2010 to October 18, 2016 | 2 | 2 |
Most recent health-based violation before October 19, 2016: Fluoride, began July 2014, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Fluoride
Contaminant limit exceeded
|
Jul 1, 2014 | Resolved |
|
Fluoride
Contaminant limit exceeded
|
Apr 1, 2014 | Resolved |
Enforcement actions
California regulators took 1 formal enforcement action against South Mesa WC in 2014. The most recent was a compliance order (no penalty) in October 2014.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 21, 2014 | California | Compliance order (no penalty) | 2 violations (2 health-based): Fluoride |
Where the water comes from
South Mesa WC draws water from 8 wells. It also has an emergency connection to Yucaipa Valley Water District. 1 other public water system has an emergency connection to South Mesa WC.
Emergency or part-time connections to
- Yucaipa Valley Water District Yucaipa, CA
Annual water quality report
South Mesa WC 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