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Callender Lake

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
2,103 people
Connections
701
Water source
Groundwater
Based in
Austin, TX
County
Van Zandt
Owner
Private
The ZIP code it serves

75778

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), chromium (total), fluoride, nitrate, arsenic and uranium: Texas’s own results, samples taken from June 23, 2020 to June 18, 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

29.3ppb

Highest yearly average, 2020 to 2026

2026, one sample: 27.8 ppb

Averaged by year, the highest was 29.3 ppb, in 2021, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its one sample was 27.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 39.4 ppb, in 2017.

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

4.0ppb

Highest yearly average, 2020 to 2026

2026, one sample: 3.2 ppb

Averaged by year, the highest was 4.0 ppb, in 2025, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, its one sample was 3.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 5.6 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

Chromium (total)

Comes from the source

Below EPA’s limits

3.5ppb

Highest yearly average, 2022 to 2025

2025: not found

Averaged by year, the highest was 3.5 ppb, in 2022, below EPA’s legal limit of 100 ppb. Its highest single sample was 3.9 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 3.8 ppb, in 2012.

What handles it

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.077ppm

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 0.077 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.092 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.23 ppm, in 2012.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.071ppm

Highest sample; found in 12 of 12

2025 average: 0.041 ppm

The highest sample, in 2021, was 0.071 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, its two samples averaged 0.041 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.15 ppm, in 2019.

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

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

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), chromium (total), fluoride, nitrate, arsenic and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Callender Lake’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 June 23, 2020 to June 18, 2026.

Testing your own tap

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

  • Analytical Environmental Labs

    Tyler, TX · about 23 miles

    Certified for bacteria

    (903) 509-8700

  • Northeast Texas Public Health District Laboratory

    Tyler, TX · about 23 miles

    Certified for bacteria

    (903) 535-0090

  • Environmental Monitoring Lab

    Winona, TX · about 38 miles

    Certified for bacteria

    (903) 877-9222

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 TX2340007. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Van Zandt County

All Texas utilities

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