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Kiona Village Court

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
124 people
Connections
35
Water source
Groundwater
Based in
Prosser, WA
County
Benton
Owner
Private
Hardness
Soft
The ZIP code it serves

99320

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

Fluoride, nitrate, total trihalomethanes (TTHM), chromium (total), arsenic and haloacetic acids (HAA5): Washington’s own results, samples taken from March 9, 2020 to Sept. 24, 2024, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits4

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.55ppm

Highest yearly average, 2022

Averaged by year, the highest was 0.55 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 0.44 ppm, in 2013.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.6ppm

Highest sample; found in 1 of 5

2023: not found

The highest sample, in 2021, was 0.6 ppm, below EPA’s legal limit of 10 ppm. In 2023, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 13.4 ppm, in 2012, and EPA recorded violations in 2012 and 2013.

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

2.9ppb

Highest yearly average, 2021 to 2024

2024: not found

Averaged by year, the highest was 2.9 ppb, in 2021, below EPA’s legal limit of 80 ppb. In 2024, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 39.8 ppb, in 2012.

What handles it

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

Chromium (total)

Comes from the source

Below EPA’s limits

2.5ppb

Highest yearly average, 2022

Averaged by year, the highest was 2.5 ppb, in 2022, below EPA’s legal limit of 100 ppb. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.0 ppb, in 2013.

What handles it

3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Haloacetic acids (HAA5)
  • Lead

Hardness

Soft, 56 mg/L (3.3 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 3.3 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. Fluoride, nitrate, total trihalomethanes (TTHM), chromium (total), arsenic and haloacetic acids (HAA5) results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. Kiona Village Court’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 March 9, 2020 to Sept. 24, 2024.

Testing your own tap

Kiona Village Court’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 Village Court 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 WA5342175. Rebuilt from EPA data on Oct. 18, 2026.

Also in Benton County

All Washington utilities

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