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Libby WSC

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
513 people
Connections
215
Water source
Groundwater
Based in
Martinsville, TX
County
Nacogdoches
Owner
Local government
The ZIP code it serves

75961

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. 1 health-based violation since 2016.

What was found

Total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, chromium (total), nitrate, arsenic and uranium: Texas’s own results, samples taken from March 18, 2020 to Sept. 9, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits5

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

63.2ppb

Highest yearly average, 2020 to 2026

2026 average: 49.1 ppb

Averaged by year, the highest was 63.2 ppb, in 2024, below EPA’s legal limit of 80 ppb. Its highest single sample was 122 ppb. In 2026, the latest year on file, its three samples averaged 49.1 ppb. EPA recorded no violation for total trihalomethanes (TTHM) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 74.4 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

Below EPA’s limits

32.6ppb

Highest yearly average, 2020 to 2026

2026 average: 30 ppb

Averaged by year, the highest was 32.6 ppb, in 2024, below EPA’s legal limit of 60 ppb. Its highest single sample was 53.3 ppb. In 2026, the latest year on file, its three samples averaged 30 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 41 ppb, in 2018.

What handles it

No certification claim covers this compound yet.

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.35ppm

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 0.35 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.37 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.38 ppm, in 2012.

What handles it

Chromium (total)

Comes from the source

Below EPA’s limits

0.8ppb

Highest yearly average, 2022 to 2025

2025: not found

Averaged by year, the highest was 0.8 ppb, in 2022, below EPA’s legal limit of 100 ppb. Its highest single sample was 1.6 ppb. In 2025, the latest year on file, it wasn’t found in any of its two samples. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.6 ppb, in 2016.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.052ppm

Highest sample; found in 6 of 12

2025 average: 0.015 ppm

The highest sample, in 2022, was 0.052 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, its two samples averaged 0.015 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.12 ppm, in 2015.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Lead
  • Uranium

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Lead and Copper Rule RevisionsThe required inventory of lead service lines was not completed or submitted on time.EPA: LSL InventoryOct. 17, 2024—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 7 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, chromium (total), nitrate, arsenic and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Libby WSC’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 March 18, 2020 to Sept. 9, 2026.

Testing your own tap

Libby WSC’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 Libby WSC serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Eastex Environmental Lab, Inc.-Nacogdoches

    Nacogdoches, TX · under a mile

    Certified for bacteria

    (936) 569-8879

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

    Kilgore, TX · about 61 miles

    Certified for bacteria, lead and copper

    (903) 984-0551

  • Analytical Environmental Labs

    Tyler, TX · about 67 miles

    Certified for bacteria

    (903) 509-8700

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 TX1740012. Rebuilt from EPA data on Oct. 18, 2026.

Also in Nacogdoches County

All Texas utilities

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