Water Quality: San Martin, CA
5 water systems • 961 people served
Some ConcernsWater Quality Summary
San Martin is served by 5 public water systems with a combined service population of 961 people, and has 7 EPA Safe Drinking Water Act violations on record. Critically, 1 of those are health-based violation, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. San Martin's violation count is 85% below the national average for California. Contaminants associated with violations include Gross Alpha.
Contaminants Found
Alpha-emitting radioactive particles increase cancer risk, particularly from bone and other internal cancers.
Common source: Natural uranium and radium in geological formations
EPA limit: 15 pCi/L (excluding radon and uranium)
Water Systems Serving San Martin
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| SAN MARTIN COUNTY WATER DISTRICT | CA4300542 | Groundwater | 627 | 4 |
| SAN MARTIN FOOTHILLS WATER COMPANY | CA4300638 | Groundwater | 145 | 2 |
| RANCHO ROBLES MUTUAL WATER COMPANY | CA4300577 | Groundwater | 103 | 0 |
| SOUTH COUNTY RETIREMENT HOME | CA4300832 | Groundwater | 46 | 1 |
| CHIRI SWEET WATER COMPANY | CA4300757 | Groundwater | 40 | 0 |
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.
Other Cities in California
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.