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Avalon 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
1,218 people
Connections
406
Water source
Groundwater
Based in
Avalon, TX
County
Ellis
Owner
Local government
The 3 ZIP codes it serves

76041, 76623, 76651

The short answer

1 result is above the health goal. The worst: Arsenic, above the health goal. 1 health-based violation since 2016.

What handles it

What was found

Arsenic, fluoride, total trihalomethanes (TTHM), haloacetic acids (HAA5), chromium (total), nitrate and uranium: Texas’s own results, samples taken from June 23, 2020 to Sept. 24, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal1

Arsenic

Comes from the source

Above the health goal

6.8ppb

Highest yearly average, 2020 to 2026

2026, one sample: 5.2 ppb

Averaged by year, the highest was 6.8 ppb, in 2020: below EPA’s legal limit of 10 ppb, but above its health goal of zero. In 2026, the latest year on file, its one sample was 5.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 7.9 ppb, in 2015.

What handles it

  • NSF/ANSI 58 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
  • NSF/ANSI 53 look for “Arsenic (Pentavalent)<=50 ppb Reduction”

Below EPA’s limits5

Fluoride

Forms or is added in treatment

Below EPA’s limits

2.7ppm

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 2.7 ppm, in 2026, 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 2.9 ppm, in 2017.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

25.9ppb

Highest yearly average, 2020 to 2026

2026 average: 5.8 ppb

Averaged by year, the highest was 25.9 ppb, in 2021, below EPA’s legal limit of 80 ppb. Its highest single sample was 90.7 ppb. In 2026, the latest year on file, its five samples averaged 5.8 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 96.9 ppb, in 2014, and EPA recorded a violation in 2015.

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 average: 3.8 ppb

Averaged by year, the highest was 6.9 ppb, in 2024, below EPA’s legal limit of 60 ppb. Its highest single sample was 14.8 ppb. In 2026, the latest year on file, its five samples averaged 3.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 8.8 ppb, in 2013.

What handles it

No certification claim covers this compound yet.

Chromium (total)

Comes from the source

Below EPA’s limits

8.4ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 8.4 ppb, in 2020, below EPA’s legal limit of 100 ppb. In 2026, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 6.1 ppb, in 2012.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.058ppm

Highest sample; found in 13 of 13

2026, one sample: 0.058 ppm

The highest sample, in 2026, was 0.058 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its one sample was 0.058 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.06 ppm, in 2018.

What handles it

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

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

  • NSF/ANSI 53

    Claim: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

    Other certifiers’ wording: Arsenic (III) (50 ppb influent level)

  • NSF/ANSI 58

    Claim: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

    Other certifiers’ wording: Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level)

At the tap, or for the whole house?

These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

The best reverse osmosis systems, ranked

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—Unaddressed
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 19 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Arsenic, fluoride, total trihalomethanes (TTHM), haloacetic acids (HAA5), chromium (total), nitrate and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Avalon 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 June 23, 2020 to Sept. 24, 2026.

Testing your own tap

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

  • Environmental Monitoring Lab

    Hillsboro, TX · about 23 miles

    Certified for bacteria

    (254) 582-2622

  • Bio-Chem Lab, Inc.

    West, TX · about 35 miles

    Certified for bacteria, lead and copper

    (254) 829-8001

  • Eurofins Xenco, LLC -Dallas

    Dallas, TX · about 46 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 TX0700019. Rebuilt from EPA data on Oct. 18, 2026.

Also in Ellis County

All Texas utilities

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