Skip to content
TapBuff
ZIP

Kiona West Heights Water Assoc.

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
77 people
Connections
36
Water source
Groundwater
Based in
Cle Elum, WA
County
Benton
Owner
Private
Hardness
Hard
The ZIP code it serves

99320

The short answer

1 result is above the health goal. The worst: Uranium, above the health goal. No health-based violations on file since 2016.

What handles it

What was found

Uranium, nitrate, fluoride, arsenic, chromium (total), haloacetic acids (HAA5) and total trihalomethanes (TTHM): Washington’s own results, samples taken from June 9, 2020 to Feb. 3, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal1

Uranium

Comes from the source

Above the health goal

0.9ppb

Highest yearly average, 2022 to 2026

2026, one sample: 0.6 ppb

Averaged by year, the highest was 0.9 ppb, in 2022: below EPA’s legal limit of 30 ppb, but above its health goal of zero. In 2026, the latest year on file, its one sample was 0.6 ppb.

What handles it

Below EPA’s limits2

Nitrate

Comes from the source

Below EPA’s limits

3.5ppm

Highest sample; found in 6 of 7

2025 average: 0.3 ppm

The highest sample, in 2022, was 3.5 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, its two samples averaged 0.3 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.7 ppm, in 2012.

What handles it

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

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.41ppm

Highest yearly average, 2025

Averaged by year, the highest was 0.41 ppm, in 2025, 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 0.46 ppm, in 2018.

What handles it

5 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Haloacetic acids (HAA5)
  • Lead
  • Total trihalomethanes (TTHM)

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.”

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

None of the filters TapBuff has checked so far carry these claims. Search the certifier listings for the claim above.

Compare five-year costs

Hardness

Hard, 133 mg/L (7.8 grains per gallon), at its one sampling point, in 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 7.8 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. There is 1 monitoring or reporting violation: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Uranium, nitrate, fluoride, arsenic, chromium (total), haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. Kiona West Heights Water Assoc.’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 June 9, 2020 to Feb. 3, 2026.

Testing your own tap

Kiona West Heights Water Assoc.’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 Kiona West Heights Water Assoc. serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Energy NW Environmental (PPL) Lab

    Richland, WA · about 10 miles

    Certified for bacteria

    (509) 372-5429

  • Energy Northwest Environmental Services Lab

    Richland, WA · about 10 miles

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

    (509) 377-8058

  • Benton-Franklin Health District Lab

    Kennewick, WA · about 15 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (509) 460-4206

All 84 certified labs for Washington

Sources

PWSID WA5316589. Rebuilt from EPA data on Oct. 18, 2026.

Also in Benton County

All Washington utilities

What to do next