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Water Quality Lookup / California / Madera County / YOSEMITE NPS-MARIPOSA GROVE
EPA SDWIS · Madera County, California

YOSEMITE NPS-MARIPOSA GROVE Water Quality Report

Serving roughly 3,500 people in Madera County, California.

Data current as of July 2026
🔍Straight from EPA
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Results for YOSEMITE NPS-MARIPOSA GROVE

1 water provider directly on file, serving roughly 3,500 people in Madera County, California.

Quick answer: YOSEMITE NPS-MARIPOSA GROVE has no violations on file and no single reading stands out against its peers (311 other providers in this area). It serves roughly 3,500 people, and the full breakdown below reflects everything EPA and California have on record for it.
Utility YOSEMITE NPS-MARIPOSA GROVE Population served 3,500 Owner Federal government
No violations on file

Contaminants found

No routine contaminant monitoring data is currently on file for this specific system.

Filtration considerations: See the table below for how whole-house carbon, under-sink reverse osmosis, and under-sink carbon systems compare against what's actually on file here. These are general system types, not a specific product recommendation.
Contaminant Whole-House Carbon Under-Sink RO Under-Sink Carbon
Total Trihalomethanes (TTHM)YesYesYes
Haloacetic Acids (HAA5)YesYesYes
ChloroformYesYesYes
Chlorine / TasteYesYesYes
Sediment / TurbidityYesYesYes
TrichloroethyleneYesYesYes
TetrachloroethyleneYesYesYes
cis-1,2-DichloroethyleneYesYesYes
1,1-DichloroethyleneYesYesYes
BromoformYesYesYes
BromodichloromethaneYesYesYes
DibromochloromethaneYesYesYes
1,1,2-TrichloroethaneYesYesYes
Vinyl ChlorideYesYesYes
Carbon TetrachlorideYesYesYes
BenzeneYesYesYes
TolueneYesYesYes
XyleneYesYesYes
LeadPartialYesPartial
ArsenicPartialYesPartial
Chromium-6 (Hexavalent)PartialYesPartial
CopperPartialYesPartial
Combined UraniumPartialYesPartial
PFOAPartialYes*Partial
PFOSPartialYes*Partial
NitratePartialYesPartial
Combined RadiumPartialYesPartial
Coliform Bacteria (indicator)NoYesNo

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What is TTHM? Understanding EPA Violation Status Is Chromium-6 Dangerous? Whole-House vs. Under-Sink Filtration Lead and Copper in Drinking Water What is PFAS? Arsenic and Uranium Explained Nitrate and Fluoride Explained Water Hardness, pH, and Turbidity What is Coliform Bacteria?
WHATSINMYWATER.CO · DATA FROM EPA & STATE GOVERNMENT SOURCES