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Howell County PWSD 1

What EPA’s and CDC’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
850 people
Connections
395
Water source
Groundwater
Based in
Pomona, MO
County
Howell
Owner
Local government
The ZIP code it serves

65789

The short answer

Nothing in EPA’s and CDC’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

Nitrate, total trihalomethanes (TTHM), haloacetic acids (HAA5) and arsenic: Missouri’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2020 to 2023, with EPA’s 2012 to 2019 file for earlier years.

Chromium (total) and fluoride: EPA’s compliance monitoring file, samples taken from Oct. 11, 2012 to Oct. 8, 2018. Newer results are in the utility’s annual water quality report.

Below EPA’s limits4

Nitrate

Comes from the source

Below EPA’s limits

1.3ppm

Highest yearly average, 2020 to 2023

2023 average: 1.3 ppm

Averaged by year, the highest was 1.3 ppm, in 2020, below EPA’s legal limit of 10 ppm. In 2023, the latest year on file, it averaged 1.3 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 1.4 ppm, in 2015.

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

2.5ppb

Highest yearly average, 2020 to 2023

2023 average: 1.9 ppb

Averaged by year, the highest was 2.5 ppb, in 2022, below EPA’s legal limit of 80 ppb. In 2023, the latest year on file, it averaged 1.9 ppb.

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

2.3ppb

Highest yearly average, 2012 to 2018

2018: not found

Averaged by year, the highest was 2.3 ppb, in 2012, below EPA’s legal limit of 100 ppb. Its highest single sample was 4.5 ppb. In 2018, the latest year on file, it wasn’t found in any of its two samples.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

1.3ppb

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 1.3 ppb, in 2023, below EPA’s legal limit of 60 ppb. That was also the latest year on file.

What handles it

No certification claim covers this compound yet.

3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Fluoride
  • Lead

Violations since 2016

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

What this report can’t tell you

  • Everything else. Nitrate, total trihalomethanes (TTHM), haloacetic acids (HAA5) and arsenic results here are Missouri’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Chromium (total) and fluoride come from EPA’s file alone, which ends in 2019. Howell County PWSD 1’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; CDC’s yearly averages for Missouri cover 2020 to 2023; EPA’s compliance samples are from Oct. 11, 2012 to Oct. 8, 2018.

Testing your own tap

Howell County PWSD 1’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 Missouri certifies.

The 3 labs Missouri certifies closest to the area Howell County PWSD 1 serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Perfect Water Testing

    Salem, MO · about 55 miles

    Certified for bacteria

    (573) 729-6451

  • Fort Leonard Wood Department of Public Health-U.S. Army

    Fort Leonard Wood, MO · about 60 miles

    Certified for bacteria

    (573) 329-1909

  • Laclede County Health Department Laboratory

    Lebanon, MO · about 71 miles

    Certified for bacteria

    (417) 532-3477

Missouri State Public Health Laboratory: Coliform and E. coli testing for private wells and other private drinking water sources, in kits from your local public health agency. A free state courier can carry the sample to the lab overnight. The handling fee is $10, by check or money order. Private Drinking Water Bacteriological Testing, Missouri Department of Health and Senior Services.

All 64 certified labs for Missouri

Sources

PWSID MO4024264. Rebuilt from EPA data on Oct. 18, 2026.

Also in Howell County

All Missouri utilities

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