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Badger Mountain Irrigation District

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
2,331 people
Connections
914
Water source
Surface water bought from another system
Based in
Kennewick, WA
County
Benton
Owner
Local government
The 2 ZIP codes it serves

99338, 99352

The short answer

2 results are above EPA’s legal limit, and 1 more is above the health goal. The worst: Total trihalomethanes (TTHM), above the legal limit. 7 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2001 to 2023.

Total trihalomethanes (TTHM), haloacetic acids (HAA5) and nitrate: Washington’s own results, samples taken from Jan. 9, 2020 to Aug. 12, 2026, with EPA’s 2012 to 2019 file for earlier years.

Fluoride, chromium (total) and arsenic: EPA’s compliance monitoring file, samples taken from Sept. 27, 2016 to Oct. 17, 2018. Newer results are in the utility’s annual water quality report.

Above the legal limit2

Total trihalomethanes (TTHM)

Forms or is added in treatment

Above the legal limit

90.1ppb

Highest yearly average, 2020 to 2026

2026 average: 44.7 ppb

Averaged by year, the highest was 90.1 ppb, in 2023, above EPA’s legal limit of 80 ppb. Its highest single sample was 144 ppb. In 2026, the latest year on file, its six samples averaged 44.7 ppb. EPA recorded violations for total trihalomethanes (TTHM) at this utility in 2023 and 2024. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 51.4 ppb, in 2018.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Above the legal limit

41.7ppb

Highest yearly average, 2020 to 2026

2026 average: 30.3 ppb

Averaged by year, the highest was 41.7 ppb, in 2022, below EPA’s legal limit of 60 ppb. Its highest single sample was 199 ppb. In 2026, the latest year on file, its six samples averaged 30.3 ppb. EPA judges this limit at each sampling point, and recorded violations for haloacetic acids (HAA5) at this utility in 2022 and 2023. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 32.5 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

2.8ppb

90th percentile, 2021 to 2023

In the latest period, 9 in 10 homes sampled were at or below 2.8 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

What handles it

Below EPA’s limits3

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.79ppm

Highest yearly average, 2016 to 2018

2018, one sample: 0.56 ppm

Averaged by year, the highest was 0.79 ppm, in 2016, below EPA’s legal limit of 4.0 ppm. In 2018, the latest year on file, its one sample was 0.56 ppm.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.5ppm

Highest sample; found in 1 of 14

2025: not found

The highest sample, in 2021, was 0.5 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, it wasn’t found in any of its four samples. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.7 ppm, in 2016.

What handles it

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

Chromium (total)

Comes from the source

Below EPA’s limits

2.3ppb

Highest yearly average, 2016 to 2018

Averaged by year, the highest was 2.3 ppb, in 2018, below EPA’s legal limit of 100 ppb. That was also the latest year on file.

What handles it

One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic

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

    Claims: Trihalomethanes (TTHM) Reduction, Lead Reduction

    For: Total trihalomethanes (TTHM), Lead

    Other certifiers’ wording: VOC Reduction

  • NSF/ANSI 58

    Claims: Trihalomethanes (TTHM) Reduction, Lead Reduction

    For: Total trihalomethanes (TTHM), Lead

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. 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 water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2024 to March 31, 2024107 UG/LArchived
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2023 to Dec. 31, 202389.2 UG/LArchived
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2023 to Sept. 30, 202391.3 UG/LArchived
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2023 to June 30, 202384.8 UG/LArchived
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2023 to March 31, 202363.5 UG/LArchived
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2022 to Dec. 31, 202261.8 UG/LArchived
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2022 to Sept. 30, 202261.2 UG/LArchived
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 63 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5) and nitrate results here are Washington’s own from 2020 on, with EPA’s national file for 2012 to 2019. Fluoride, chromium (total) and arsenic come from EPA’s file alone, which ends in 2019. Badger Mountain Irrigation District’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 Jan. 9, 2020 to Aug. 12, 2026; EPA’s compliance samples are from Sept. 27, 2016 to Oct. 17, 2018.

Testing your own tap

Badger Mountain Irrigation District’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 Badger Mountain Irrigation District 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 4 miles

    Certified for bacteria

    (509) 372-5429

  • Benton-Franklin Health District Lab

    Kennewick, WA · about 5 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (509) 460-4206

  • Energy Northwest Environmental Services Lab

    Richland, WA · about 9 miles

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

    (509) 377-8058

All 84 certified labs for Washington

Sources

PWSID WA5322617. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Benton County

All Washington utilities

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