Public water system record
Green River Mutual Water Co.
Serves Whitley Gardens, San Luis Obispo County, CA · 350 people served
Federal records show 2 health-based violations and 3 monitoring/reporting issues for Green River Mutual Water Co. in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 0
- Unresolved
- 1
- Archived by EPA
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Green River Mutual Water Co. draws water from 3 wells.
- Highest measured level in the last 10 years: Selenium, 140 µg/L, federal limit 50 µg/L (2.8 times the limit), 2021.
- Most recent formal enforcement: compliance order (no penalty) by California, November 2022.
- Record on file since 1980, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 117 service lines.
Check whether Green River 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.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Active | No |
|
Selenium
Contaminant limit exceeded
Measured 140 µg/L, federal limit 50 µg/L (2.8 times the limit)
|
330 | Oct 1, 2021 |
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 |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Active |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
Full record since 1980
EPA's records for Green River Mutual Water Co. go back to 1980. Before October 19, 2016 they list 2 health-based violations (1 resolved, 1 archived by EPA without a recorded fix) and 6 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 1 | 4 |
| 1990s | 0 | 1 |
| 2000s | 1 | 1 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 2 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began July 2005, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2005 | Resolved |
|
Selenium
Contaminant limit exceeded
|
Mar 2, 1982 | Archived |
Enforcement actions
California regulators took 3 formal enforcement actions against Green River Mutual Water Co. between 2018 and 2022. The most recent was a compliance order (no penalty) in November 2022.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Nov 8, 2022 | California | Compliance order (no penalty) | 1 violation (1 health-based): Selenium |
| Nov 6, 2018 | California | Compliance order (no penalty) | 1 violation: Nitrate |
| Mar 8, 2018 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
What the violations mean
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Selenium
1 incidentTest results for Selenium 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 River Mutual Water Co. draws water from 3 wells.
Annual water quality report
Green River 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 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Green River Mutual Water Co. 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