Tap Water Quality Report for Mariposa, California

Last Provided Update:N/A
Next Expected Update:April 19, 2025

Track your tap water quality with EPA-verified data on contaminants, violations, and health guidelines, updated quarterly from official water system monitoring results.

Mariposa, California tap water has 103 total contaminants, with 3 being above EPA standards and 70 being above InTheTap suggested standards. There are 0 active violations. The primary water source is not specified, serving 0 residents.

Water Systems (13)

13 water systems serve Mariposa, California. Select one or more to filter the data below.

MARIPOSA PUBLIC UTILITY DIST
Public Water System ID:CA2210001
Population Served:2,000
Primary Source:Surface water
Last Updated:Nov 15, 2024
Contact:
YOSEMITE NPS-YOSEMITE VALLEY
Public Water System ID:CA2210503
Population Served:1,000
Primary Source:Ground water
Last Updated:Nov 15, 2024
Contact:
PONDEROSA BASIN MUTUAL WTR CO
Public Water System ID:CA2210002
Population Served:798
Primary Source:Ground water
Last Updated:Nov 15, 2024
Contact:
CEDAR LODGE RESORT
Public Water System ID:CA2210900
Population Served:656
Primary Source:Ground water
Last Updated:Nov 15, 2024
Contact:
YOSEMITE NPS-EL PORTAL
Public Water System ID:CA2210515
Population Served:635
Primary Source:Ground water
Last Updated:Nov 15, 2024
Contact:
YOSEMITE WEST WATER SYSTEM
Public Water System ID:CA2210924
Population Served:420
Primary Source:Ground water
Last Updated:Nov 15, 2024
Contact:

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Water Quality Analysis

Comprehensive analysis of your water quality, showing both detected contaminants and violations history. Note that exceeding EPA contaminant levels in a single test doesn't always constitute a violation, as violations typically require sustained exceedances or failure to follow required treatment protocols.

Water Analysis

View detected contaminants and concentration levels for your water system(s).