Water Quality: Oroville, CA
7 water systems • 35,433 people served
Multiple Health ViolationsWater Quality Summary
Oroville is served by 7 public water systems with a combined service population of 35,433 people, and has 37 EPA Safe Drinking Water Act violations on record. Critically, 5 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Oroville's violation count is 23% below the national average for California. Contaminants associated with violations include Mercury, Stage 2 DBP, Total Haloacetic Acids (HAA5).
Contaminants Found
Damages kidneys and the central nervous system; causes developmental harm to fetuses and infants.
Common source: Natural deposits, industrial discharges, landfill runoff
EPA limit: 0.002 mg/L (2 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
Haloacetic acids are associated with increased cancer risk and potential reproductive and developmental effects.
Common source: Reaction of chlorine disinfectants with organic matter in treated water
EPA limit: 0.060 mg/L (60 ppb)
Water Systems Serving Oroville
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| SOUTH FEATHER W&P - MINERS RANCH | CA0410006 | Surface Water | 22,664 | 0 |
| THERMALITO WATER & SEWER DIST | CA0410008 | Surface Water | 12,136 | 10 |
| PLEASANT GROVE MHP | CA0400020 | Groundwater | 327 | 19 |
| FOOTHILLS MANUFACTURED HOME COMMUNUTY | CA0400027 | Groundwater | 180 | 4 |
| SOUTH FEATHER W&P - BANGOR | CA0410012 | Surface Water | 73 | 0 |
| BERRY CREEK COMMUNITY SERVICE DIST | CA0400016 | Groundwater | 28 | 4 |
| FALLING ROCK RV PARK | CA0400117 | Groundwater | 25 | 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.