Water Quality: Yosemite Np, CA
4 water systems • 1,836 people served
Some ConcernsWater Quality Summary
Yosemite Np is served by 4 public water systems with a combined service population of 1,836 people, and has 17 EPA Safe Drinking Water Act violations on record. Critically, 3 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Yosemite Np's violation count is 65% below the national average for California. Contaminants associated with violations include Contaminant 1022, Disinfection Byproducts.
Contaminants Found
Broad category of chemicals formed during disinfection, associated with increased cancer risk and adverse reproductive effects.
Common source: Reaction of disinfectants (chlorine, ozone, chloramines) with organic matter
Water Systems Serving Yosemite Np
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| YOSEMITE NPS-YOSEMITE VALLEY | CA2210503 | Groundwater | 1,000 | 3 |
| YOSEMITE NPS-EL PORTAL | CA2210515 | Groundwater | 635 | 6 |
| YOSEMITE NPS-WAWONA | CA2210510 | Surface Water | 150 | 2 |
| YOSEMITE NPS-HODGDON MEADOW | CA5510503 | Groundwater | 51 | 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.