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City of Clarksville City

What EPA’s and Texas’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
972 people
Connections
337
Water source
Groundwater
Based in
White Oak, TX
County
Gregg
Owner
Local government
The 2 ZIP codes it serves

75647, 75693

The short answer

Nothing in EPA’s and Texas’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

Total trihalomethanes (TTHM), haloacetic acids (HAA5), nitrate, fluoride, arsenic, chromium (total) and uranium: Texas’s own results, samples taken from Sept. 17, 2020 to Sept. 16, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits4

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

27.3ppb

Highest yearly average, 2020 to 2026

2026 average: 15.8 ppb

Averaged by year, the highest was 27.3 ppb, in 2024, below EPA’s legal limit of 80 ppb. Its highest single sample was 30.2 ppb. In 2026, the latest year on file, its two samples averaged 15.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 41.3 ppb, in 2019.

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

Below EPA’s limits

9.8ppb

Highest yearly average, 2020 to 2026

2026 average: 5.5 ppb

Averaged by year, the highest was 9.8 ppb, in 2021, below EPA’s legal limit of 60 ppb. Its highest single sample was 10.1 ppb. In 2026, the latest year on file, its two samples averaged 5.5 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 11.6 ppb, in 2017.

What handles it

No certification claim covers this compound yet.

Nitrate

Comes from the source

Below EPA’s limits

0.2ppm

Highest sample; found in 7 of 7

2026, one sample: 0.2 ppm

The highest sample, in 2026, was 0.2 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its one sample was 0.2 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.24 ppm, in 2015.

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

0.047ppm

Highest yearly average, 2022 to 2025

Averaged by year, the highest was 0.047 ppm, in 2025, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.21 ppm, in 2016.

What handles it

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

Violations since 2016

No health-based violations on file with EPA since 2016. There are 15 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), nitrate, fluoride, arsenic, chromium (total) and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. City of Clarksville City’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; Texas’s results run from Sept. 17, 2020 to Sept. 16, 2026.

Testing your own tap

City of Clarksville City’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 Texas certifies.

The 3 labs Texas certifies closest to the area City of Clarksville City serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Southern Petroleum Laboratories (SPL), Inc. (FKA Ana-Lab Corporation)

    Kilgore, TX · about 10 miles

    Certified for bacteria, lead and copper

    (903) 984-0551

  • Environmental Monitoring Lab

    Winona, TX · about 12 miles

    Certified for bacteria

    (903) 877-9222

  • Northeast Texas Public Health District Laboratory

    Tyler, TX · about 26 miles

    Certified for bacteria

    (903) 535-0090

Texas Well Owner Network, Texas A&M AgriLife Extension: Well Informed screening events, where well owners bring in water samples to be screened for common contaminants, followed by an hour-long session explaining the results. Upcoming events are on the network's calendar. Trainings, Texas Well Owner Network.

All 80 certified labs for Texas

Sources

PWSID TX0920010. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Gregg County

All Texas utilities

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