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Green Mountain Mobile Ranch

What EPA’s and Washington’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
80 people
Connections
51
Water source
Groundwater
Based in
Auburn, WA
County
Clark
Owner
Private
Hardness
Soft
The ZIP code it serves

98682

The short answer

Nothing in EPA’s and Washington’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.

7 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)

Hardness

Soft, 48 mg/L (2.8 grains per gallon), at its one sampling point, in 2020.

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 includedSoftener or salt-free conditioner?Washington water hardness, utility by utility

Violations since 2016

No health-based violations on file with EPA since 2016.

What this report can’t tell you

  • Everything else. Arsenic, chromium (total), fluoride, haloacetic acids (HAA5), nitrate and total trihalomethanes (TTHM) results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. Green Mountain Mobile Ranch’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; Washington’s results run from Aug. 19, 2020 to March 11, 2026.

Testing your own tap

Green Mountain Mobile Ranch’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 Washington certifies.

The 3 labs Washington certifies closest to the area Green Mountain Mobile Ranch serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • BSK Associates - Vancouver

    Vancouver, WA · about 7 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (360) 750-0055

  • Columbia Laboratories, Inc.

    Portland, OR · about 8 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics

    (503) 254-1794

  • Rose City Laboratories, LLC

    Portland, OR · about 14 miles

    Certified for bacteria, nitrate, lead and copper, metals

    (503) 307-0096

All 84 certified labs for Washington

Sources

PWSID WA5353991. Rebuilt from EPA data on Oct. 18, 2026.

Also in Clark County

All Washington utilities

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