Water Quality: San Marcos, CA
2 water systems • 113,596 people served
Multiple Health Violations182
Total Violations
53
Health-Based Violations
2
Water Systems
113,596
Population Served
Water Quality Summary
San Marcos has 53 health-based violations on record, meaning one or more contaminants were found above EPA-established safe levels. Contaminants involved: Lead, Selenium. In total, 182 violations are on record for 2 water systems serving 113,596 people.
Contaminants Found
Lead
Selenium
Water Systems Serving San Marcos
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| VALLECITOS WD | CA3710002 | Surface Water | 113,500 | 1 |
| OCOTILLO OASIS, LLC | CA3700291 | Groundwater | 96 | 181 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.