Larkin Woods Mutual Water Company
PWSID: CA4900582
This system has no violations on record.
System Details
| Population Served | 34 |
| Service Connections | 18 |
| Water Source | Groundwater Under Influence |
| System Type | Community Water System |
| Owner | Private |
| Status | Active |
| City | Sebastopol |
| EPA ZIP on File | 95472 |
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Copper (90th percentile) | 2.6000 mg/L | 1.300 mg/L | Exceeds Action Level |
| Copper (90th percentile) | 1.8500 mg/L | 1.300 mg/L | Exceeds Action Level |
| Copper (90th percentile) | 1.5000 mg/L | 1.300 mg/L | Exceeds Action Level |
| Lead (90th percentile) | 0.0042 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0025 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0000 mg/L | 0.015 mg/L | Below Action Level |
Violation History (0 total)
No violations on record for this water system.
Understanding This Water System's Record
Larkin Woods Mutual Water Company is a community water system water system that draws from groundwater under influence sources and serves a population of 34 in Sebastopol, California. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.
What Do These Violations Mean?
Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.
What Should You Do?
Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.