Water Quality: Portola, CA
6 water systems • 4,146 people served
Multiple Health ViolationsWater Quality Summary
Portola is served by 6 public water systems with a combined service population of 4,146 people, and has 38 EPA Safe Drinking Water Act violations on record. Critically, 25 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Portola's violation count is 21% below the national average for California. Contaminants associated with violations include Haloacetic Acids, Stage 2 DBP.
Contaminants Found
Linked to increased cancer risk and potential reproductive and developmental effects with long-term exposure.
Common source: Reaction of chlorine disinfectants with organic matter in treated water
EPA limit: 0.060 mg/L (60 ppb)
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 Portola
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| CITY OF PORTOLA | CA3210003 | Surface Water | 2,100 | 0 |
| GRIZZLY LAKE CSD-DELLEKER | CA3200104 | Groundwater | 1,314 | 28 |
| GREENHORN CREEK CSD | CA3200188 | Groundwater | 280 | 0 |
| GRIZZLY LAKE CSD-CROCKER/WELCH | CA3200107 | Groundwater | 215 | 8 |
| GOLD MOUNTAIN CSD | CA3205003 | Groundwater | 135 | 2 |
| GRIZZLY RANCH CSD | CA3205006 | Groundwater | 102 | 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.