Ranch Road Estates Mutual Water Company

What EPA’s and California’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves: 57 people
Connections: 27
Water source: Groundwater
Based in: Bishop, CA
County: Inyo
Owner: Private
Hardness: Soft

The ZIP code it serves

93514

The short answer

Nothing in EPA’s and California’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. No health-based violations on file since 2016.

What was found

None of the contaminants in the records below were found at or above the reporting levels.

8 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

Arsenic
Chromium (total)
Fluoride
Haloacetic acids (HAA5)
Lead
Nitrate
Total trihalomethanes (TTHM)
Uranium

Hardness

Soft, typically 48 mg/L (2.8 grains per gallon), across 2 sampling points, 2019 to 2025.

Hardness is calcium and magnesium. EPA sets no limit for it: it shows up as scale on fixtures and in water heaters, and as soap that won’t lather. USGS calls water above 60 mg/L moderately hard, above 120 hard and above 180 very hard.

Softeners compared at 2.8 grains per gallon, salt included Softener or salt-free conditioner?California water hardness, utility by utility

Violations since 2016

No health-based violations on file with EPA since 2016. There is 1 monitoring or reporting violation: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Arsenic, chromium (total), fluoride, haloacetic acids (HAA5), nitrate, total trihalomethanes (TTHM) and uranium results here are California’s own from 2020 on, with EPA’s national file for 2012 to 2019. Ranch Road Estates Mutual Water Company’s own annual report, which it must send you every year, has the contaminants this page does not show.
Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.
Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; California’s results run from Aug. 25, 2020 to March 17, 2026.

Testing your own tap

Ranch Road Estates Mutual Water Company’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab California certifies.

The lab California certifies closest to the area Ranch Road Estates Mutual Water Company serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Inyo County Water Lab
Independence, CA · about 49 miles
Certified for bacteria
(760) 878-8476

All 145 certified labs for California

Sources

EPA UCMR 5 occurrence data, file of Oct. 15, 2026
EPA SDWA bulk download (SDWIS federal data), 2026 Q3
California State Water Resources Control Board, Division of Drinking Water, results from Jan. 1, 2020 to July 17, 2026, read Oct. 8, 2026
EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
Certified labs: California State Water Resources Control Board, ELAP accredited laboratories and their fields of accreditation, read Oct. 17, 2026; distances from the Census 2020 ZIP code tabulation area gazetteer
Hardness: California State Water Resources Control Board, Division of Drinking Water, results from July 23, 2019 to July 9, 2025, read Oct. 10, 2026
Limits and goals: each contaminant’s page, with its EPA source.
How this page is built: methodology.

PWSID CA1400031. Rebuilt from EPA data on Oct. 18, 2026.

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