Water Quality: Granite Bay, CA
6 water systems • 30,633 people served
Multiple Health ViolationsWater Quality Summary
Granite Bay is served by 6 public water systems with a combined service population of 30,633 people, and has 85 EPA Safe Drinking Water Act violations on record. Critically, 43 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Granite Bay's violation count is 77% above the national average for California. Contaminants associated with violations include Barium, Gross Alpha, Stage 2 DBP.
Contaminants Found
Increases blood pressure and causes cardiovascular effects with long-term exposure.
Common source: Natural rock deposits, oil drilling operations, coal power plant waste
EPA limit: 2 mg/L
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)
Trihalomethanes and haloacetic acids that increase cancer risk and may cause adverse reproductive outcomes.
Common source: Chlorine disinfection reacting with natural organic matter in source water
EPA limit: TTHM: 0.080 mg/L; HAA5: 0.060 mg/L
Water Systems Serving Granite Bay
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| SAN JUAN WATER DISTRICT | CA3410021 | Surface Water | 29,598 | 0 |
| HIDDEN VALLEY COMMUNITY ASSOCIATION | CA3103836 | Surface Water | 499 | 1 |
| FOLSOM LAKE MUTUAL WATER CO | CA3107339 | Surface Water | 333 | 0 |
| RIVERBEND MOBILE HOME & RV PARK | CA1000426 | Groundwater | 137 | 36 |
| EDGEWATER MOBILE HOME PARK | CA3400433 | Groundwater | 40 | 42 |
| WHEATLAND PARK ESTATES | CA5800821 | Groundwater | 26 | 6 |
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.