Public water system record
Yucaipa Valley Water District
Serves Yucaipa, Calimesa and Oak Glen, San Bernardino County and Riverside County, CA · 52,010 people served
Federal records show 4 health-based violations and 4 monitoring/reporting issues for Yucaipa Valley Water District in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.
System profile
- Health-based violations, last 10 years
- 4
- Resolved
- 4
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 4
Key facts
- Yucaipa Valley Water District draws water from 19 wells and 1 surface water intake.
- Highest measured level in the last 10 years: Nitrate, 12 mg/L, federal limit 10 mg/L (1.2 times the limit), 2023.
- Most recent formal enforcement: compliance order (no penalty) by California, November 2024.
- Record on file since 1991, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 13,640 service lines.
Check whether Yucaipa Valley Water District 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 |
|---|---|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 81.8 µg/L, federal limit 80 µg/L (at or just above the limit)
|
220 | Jul 1, 2024 | Resolved | No |
|
Nitrate
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Apr 1, 2023 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Jul 1, 2019 | Resolved | Yes |
|
Nitrate
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
330 | Jul 1, 2019 | Resolved | Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Public Notice
OTHER
|
Apr 13, 2021 | Resolved |
|
Nitrate
Monitoring and reporting
|
Apr 1, 2021 | Resolved |
|
Public Notice
OTHER
|
Jul 21, 2019 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jun 1, 2016 | Resolved |
Full record since 1991
EPA's records for Yucaipa Valley Water District go back to 1991. 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 | 1 | 0 |
| 2010 to October 18, 2016 | 0 | 1 |
| October 19, 2016 to 2019 | 2 | 1 |
| 2020s | 2 | 2 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began June 1991, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 1991 | Resolved |
Enforcement actions
California regulators took 4 formal enforcement actions against Yucaipa Valley Water District between 1993 and 2024. The most recent was a compliance order (no penalty) in November 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Nov 6, 2024 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Jun 26, 2023 | California | Compliance order (no penalty) | 6 violations (3 health-based): Nitrate, Public Notice |
| Feb 23, 2017 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Jul 19, 1993 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
What the violations mean
Nitrate
3 incidentsNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Total Trihalomethanes (TTHMs)
1 incidentDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
Yucaipa Valley Water District draws water from 19 wells and 1 surface water intake. It also buys water from Western Heights Water Company. It also has an emergency connection to South Mesa WC. 1 other community water system buys water from Yucaipa Valley Water District. 2 other public water systems have emergency connections to Yucaipa Valley Water District.
Buys water from
- Western Heights Water Company Yucaipa, CA
Emergency or part-time connections to
- South Mesa WC Calimesa, CA
Community systems that buy water from it
- Western Heights Water Company Yucaipa, CA
Annual water quality report
Yucaipa Valley Water District 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