Public water system record
Green Valley MWC
Serves an area of San Bernardino County, CA · 2,993 people served
Federal records show 1 health-based violation and 2 monitoring/reporting issues for Green Valley MWC in the last ten years. The most serious issue in this window was a Combined Uranium violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 2
Key facts
- Green Valley MWC draws water from 25 wells.
- Most recent formal enforcement: compliance order (no penalty) by California, December 2024.
- Record on file since 1993, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 1,069 service lines.
Check whether Green Valley MWC 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 |
|---|---|---|---|---|
|
Combined Uranium
Contaminant limit exceeded
|
340 | Oct 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
E. coli
Monitoring and reporting
|
Feb 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
Full record since 1993
EPA's records for Green Valley MWC 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 | 1 | 1 |
| 2010 to October 18, 2016 | 0 | 3 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 1993, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1993 | Resolved |
Enforcement actions
California regulators took 4 formal enforcement actions against Green Valley MWC between 2014 and 2024. The most recent was a compliance order (no penalty) in December 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Dec 11, 2024 | California | Compliance order (no penalty) | 1 violation (1 health-based): Combined Uranium |
| Feb 8, 2023 | California | Compliance order (no penalty) | 1 violation: E. coli |
| Jan 19, 2018 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Feb 7, 2014 | California | Compliance order (no penalty) | 3 violations: Nitrate |
What the violations mean
Combined Uranium
1 incidentTest results for Combined Uranium were above the federal limit (a maximum contaminant level violation).
The utility had to notify customers about this violation.
Where the water comes from
Green Valley MWC draws water from 25 wells. It also buys water from Clawa. 1 other public water system has an emergency connection to Green Valley MWC.
Buys water from
- Clawa Crestline, CA
Annual water quality report
Green Valley MWC 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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