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City of Earth

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
937 people
Connections
427
Water source
Groundwater
Based in
Earth, TX
County
Lamb
Owner
Local government
The ZIP code it serves

79031

The short answer

1 result is above EPA’s legal limit, and 2 more are above the health goal. The worst: Nitrate, above the legal limit. 3 health-based violations since 2016.

What handles it

What was found

Nitrate, uranium, arsenic, haloacetic acids (HAA5), fluoride, total trihalomethanes (TTHM) and chromium (total): Texas’s own results, samples taken from Jan. 14, 2020 to July 9, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Nitrate

Comes from the source

Above the legal limit

11.1ppm

Highest sample; found in 48 of 48

2026 average: 7.3 ppm

From 2023 to 2026, three samples were above EPA’s legal limit of 10 ppm, the highest 11.1 ppm in 2023. Three have no follow-up sample on file within 30 days. In 2026, the latest year on file, its six samples averaged 7.3 ppm. EPA recorded violations for nitrate at this utility in 2023 and 2026. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 9.5 ppm, in 2016.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Above the health goal2

Uranium

Comes from the source

Above the health goal

11.1ppb

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 11.1 ppb, in 2024: below EPA’s legal limit of 30 ppb, but above its health goal of zero. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 12.2 ppb, in 2018.

What handles it

Arsenic

Comes from the source

Above the health goal

1.9ppb

Highest yearly average, 2022 to 2025

2025 average: 1.8 ppb

Averaged by year, the highest was 1.9 ppb, in 2022: below EPA’s legal limit of 10 ppb, but above its health goal of zero. Its highest single sample was 2.2 ppb. In 2025, the latest year on file, its two samples averaged 1.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.8 ppb, in 2012.

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 limits3

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

26ppb

Highest yearly average, 2020 to 2026

2026, one sample: 1.2 ppb

Averaged by year, the highest was 26 ppb, in 2020, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, its one sample was 1.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 17 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

Fluoride

Forms or is added in treatment

Below EPA’s limits

1.2ppm

Highest yearly average, 2021 to 2024

2024 average: 1.2 ppm

Averaged by year, the highest was 1.2 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 1.3 ppm. In 2024, the latest year on file, its two samples averaged 1.2 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.3 ppm, in 2012.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

10.2ppb

Highest yearly average, 2020 to 2026

2026, one sample: 3.8 ppb

Averaged by year, the highest was 10.2 ppb, in 2020, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its one sample was 3.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 14.4 ppb, in 2018.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)
  • Lead

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

    Claims: Nitrate/Nitrite (30 ppm challenge), Arsenic (Pentavalent)<=50 ppb Reduction

    For: Nitrate, Arsenic

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

  • NSF/ANSI 58

    Claims: Nitrate/Nitrite Reduction, Uranium, Arsenic (Pentavalent)<=50 ppb Reduction

    For: Nitrate, Uranium, Arsenic

    Other certifiers’ wording: Nitrate; 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

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Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
NitrateA sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleApril 1, 2026 to June 30, 202611 MG/LArchived
NitrateA sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleApril 1, 2023 to June 30, 202311 MG/LResolved
NitrateA sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleJan. 1, 2023 to March 31, 202311 MG/LResolved
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. Nitrate, uranium, arsenic, haloacetic acids (HAA5), fluoride, total trihalomethanes (TTHM) and chromium (total) results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. City of Earth’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 Jan. 14, 2020 to July 9, 2026.

Testing your own tap

City of Earth’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 2 labs Texas certifies closest to the area City of Earth serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Eurofins Xenco, LLC -Lubbock

    Lubbock, TX · about 63 miles

    Certified for bacteria

    (806) 794-1296

  • Environmental Monitoring Lab

    Amarillo, TX · about 70 miles

    Certified for bacteria

    (806) 335-9393

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 TX1400002. Rebuilt from EPA data on Oct. 18, 2026.

Also in Lamb County

All Texas utilities

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