Water Quality: Oakhurst, CA
10 water systems • 1,582 people served
Multiple Health ViolationsWater Quality Summary
Oakhurst is served by 10 public water systems with a combined service population of 1,582 people, and has 236 EPA Safe Drinking Water Act violations on record. Critically, 125 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Oakhurst's violation count is 392% above the national average for California. Contaminants associated with violations include Barium, Contaminant 1028, Contaminant 4109, E. coli, Haloacetic Acids.
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
Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.
Common source: Fecal contamination from humans or animals entering the water supply
EPA limit: Zero (no E. coli permitted in drinking water)
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)
Causes neurological damage, developmental delays in children, and kidney damage in adults even at low exposure levels.
Common source: Old plumbing pipes, lead solder, brass fixtures
EPA limit: Action Level: 0.015 mg/L (15 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
Indicates possible presence of disease-causing organisms that can cause gastrointestinal illness.
Common source: Human and animal fecal waste, soil, vegetation
EPA limit: No more than 5% of monthly samples may be positive
Water Systems Serving Oakhurst
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| BROADVIEW TERRACE MUTUAL WATER COMPANY | CA2000521 | Groundwater | 498 | 2 |
| BASS LAKE HEIGHTS MUTUAL WATER | CA2000502 | Groundwater | 250 | 15 |
| SKY ACRES MUTUAL WATER CORP | CA2000524 | Groundwater | 175 | 24 |
| CEDAR VALLEY MUTUAL WATER CO | CA2000538 | Groundwater | 137 | 46 |
| SUGAR PINE HOMEOWNERS ASSOC | CA2000533 | Groundwater | 120 | 4 |
| YOSEMITE FORKS EST MUTUAL | CA2000527 | Groundwater | 110 | 45 |
| ECCO | CA2000688 | Groundwater | 100 | 15 |
| CRASS MUTUAL WATER COMPANY | CA2000530 | Groundwater | 80 | 5 |
| PIKE RANCH MUTUAL WATER CO | CA2000526 | Groundwater | 74 | 79 |
| WHISPERING PINES MHP | CA2000605 | Groundwater | 38 | 1 |
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.