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Oakdell Farms LLC

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
47 people
Connections
8
Water source
Groundwater
Based in
Waverly, WA
County
Franklin
Owner
Private
Hardness
Very hard
The ZIP code it serves

99343

The short answer

1 result is above the limit’s level with no violation recorded. The worst: Arsenic, above the limit’s level, no violation. No health-based violations on file since 2016.

What handles it

What was found

Nitrate, fluoride and chromium (total): Washington’s own results, samples taken from June 14, 2021 to Sept. 22, 2025, with EPA’s 2012 to 2019 file for earlier years.

Arsenic and total trihalomethanes (TTHM): EPA’s compliance monitoring file, samples taken from Oct. 16, 2013 to May 15, 2019. Newer results are in the utility’s annual water quality report.

Above the limit’s level, no violation recorded1

Arsenic

Comes from the source

Above the limit’s level, no violation

11ppb

Highest yearly average, 2013

Averaged by year, the highest was 11 ppb, in 2013, above EPA’s legal limit of 10 ppb. That is the only year on file. EPA judges this limit on running averages at each sampling point, and recorded no violation for arsenic at this utility from 2012 to 2019. Results like these with no violation often include water sampled before treatment or blending; the utility’s annual report says what reaches the tap.

What handles it

  • NSF/ANSI 58 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
  • NSF/ANSI 53 look for “Arsenic (Pentavalent)<=50 ppb Reduction”

Below EPA’s limits3

Nitrate

Comes from the source

Below EPA’s limits

9.8ppm

Highest sample; found in 12 of 12

2025, one sample: 7.9 ppm

The highest sample, in 2022, was 9.8 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, its one sample was 7.9 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 8.0 ppm, in 2017.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

39.9ppb

Highest yearly average, 2019

Averaged by year, the highest was 39.9 ppb, in 2019, below EPA’s legal limit of 80 ppb. That is the only year on file.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.86ppm

Highest yearly average, 2022

Averaged by year, the highest was 0.86 ppm, in 2022, below EPA’s legal limit of 4.0 ppm. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.52 ppm, in 2013.

What handles it

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)
  • Lead

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

  • NSF/ANSI 53

    Claim: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

    Other certifiers’ wording: Arsenic (III) (50 ppb influent level)

  • NSF/ANSI 58

    Claim: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

    Other certifiers’ wording: Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level)

At the tap, or for the whole house?

These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

The best reverse osmosis systems, ranked

Hardness

Very hard, 273 mg/L (16 grains per gallon), at its one sampling point, in 2022.

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 16 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. There are 2 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Nitrate, fluoride and chromium (total) results here are Washington’s own from 2021 on, with EPA’s national file for 2012 to 2019. Arsenic and total trihalomethanes (TTHM) come from EPA’s file alone, which ends in 2019. Oakdell Farms LLC’s own annual report, which it must send you every year, has newer results for those and 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 June 14, 2021 to Sept. 22, 2025; EPA’s compliance samples are from Oct. 16, 2013 to May 15, 2019.

Testing your own tap

Oakdell Farms LLC’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 Oakdell Farms LLC serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • AV Labs, Inc

    Othello, WA · about 16 miles

    Certified for bacteria

    (509) 488-2468

  • Matrix Sciences International Inc. dba KTL

    Pasco, WA · about 18 miles

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

    (509) 547-3838

  • RJ Lee Group, Inc. Columbia Basin Analytical Laboratories

    Pasco, WA · about 18 miles

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

    (509) 792-1951

All 84 certified labs for Washington

Sources

PWSID WA5362695. Rebuilt from EPA data on Oct. 18, 2026.

Also in Franklin County

All Washington utilities

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