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Weston 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
1,185 people
Connections
395
Water source
Groundwater
Based in
Weston, TX
County
Collin
Owner
Local government
The ZIP code it serves

75009

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

Fluoride, total trihalomethanes (TTHM), haloacetic acids (HAA5), chromium (total), nitrate, arsenic and uranium: Texas’s own results, samples taken from Aug. 10, 2020 to June 10, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits5

Fluoride

Forms or is added in treatment

Below EPA’s limits

1.3ppm

Highest yearly average, 2020 to 2026

2026, one sample: 1.2 ppm

Averaged by year, the highest was 1.3 ppm, in 2020, below EPA’s legal limit of 4.0 ppm. In 2026, the latest year on file, its one sample was 1.2 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.3 ppm, in 2014.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

25.6ppb

Highest yearly average, 2020 to 2026

2026, one sample: 20.2 ppb

Averaged by year, the highest was 25.6 ppb, in 2023, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its one sample was 20.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 36 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

6.9ppb

Highest yearly average, 2020 to 2026

2026, one sample: 4.1 ppb

Averaged by year, the highest was 6.9 ppb, in 2023, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, its one sample was 4.1 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 7.4 ppb, in 2016.

What handles it

No certification claim covers this compound yet.

Chromium (total)

Comes from the source

Below EPA’s limits

5.7ppb

Highest yearly average, 2022 to 2025

2025, one sample: 2.5 ppb

Averaged by year, the highest was 5.7 ppb, in 2022, below EPA’s legal limit of 100 ppb. In 2025, the latest year on file, its one sample was 2.5 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 3.8 ppb, in 2016.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.097ppm

Highest sample; found in 7 of 7

2026, one sample: 0.062 ppm

The highest sample, in 2022, was 0.097 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its one sample was 0.062 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.2 ppm, in 2017.

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. 11 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Fluoride, total trihalomethanes (TTHM), haloacetic acids (HAA5), chromium (total), nitrate, arsenic and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Weston 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 Aug. 10, 2020 to June 10, 2026.

Testing your own tap

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

  • Pace Analytical Services, LLC -Dallas TX

    Allen, TX · about 16 miles

    Certified for bacteria

    (972) 727-1123

  • Southern Petroleum Laboratories, Inc. - Plano

    Plano, TX · about 22 miles

    Certified for bacteria, lead and copper

    (972) 424-6422

  • Eurofins Xenco, LLC -Dallas

    Dallas, TX · about 33 miles

    Certified for bacteria

    (281) 240-4200

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 TX0430050. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Collin County

All Texas utilities

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