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City of Flatonia

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
1,969 people
Connections
856
Water source
Groundwater
Based in
Flatonia, TX
County
Fayette
Owner
Local government
The ZIP code it serves

78941

The short answer

1 result is above EPA’s legal limit, and 2 more are above the health goal. The worst: Arsenic, above the legal limit. 9 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 1994 to 2023.

Arsenic, uranium, total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, chromium (total) and nitrate: Texas’s own results, samples taken from Feb. 28, 2020 to Aug. 4, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Arsenic

Comes from the source

Above the legal limit

9.9ppb

Highest yearly average, 2020 to 2026

2026 average: 9.6 ppb

Averaged by year, the highest was 9.9 ppb, in 2024: below EPA’s legal limit of 10 ppb, but above its health goal of zero. Its highest single sample was 15.7 ppb. In 2026, the latest year on file, its four samples averaged 9.6 ppb. EPA judges this limit at each sampling point, and recorded a violation for arsenic at this utility in 2026. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 11.3 ppb, in 2017, and EPA recorded violations in 2012, 2017 and 2018.

What handles it

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

Above the health goal2

Lead

Comes from pipes, often your own

Above the health goal

5.0ppb

90th percentile, 2021 to 2023

In the latest period, 9 in 10 homes sampled were at or below 5.0 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

What handles it

Uranium

Comes from the source

Above the health goal

3.7ppb

Highest yearly average, 2021 to 2025

2025, one sample: 3.3 ppb

Averaged by year, the highest was 3.7 ppb, in 2022: below EPA’s legal limit of 30 ppb, but above its health goal of zero. In 2025, the latest year on file, its one sample was 3.3 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 5.8 ppb, in 2019.

What handles it

Below EPA’s limits3

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

56.7ppb

Highest yearly average, 2020 to 2026

2026, one sample: 36 ppb

Averaged by year, the highest was 56.7 ppb, in 2024, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its one sample was 36 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 44.8 ppb, in 2016.

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

8.5ppb

Highest yearly average, 2020 to 2026

2026, one sample: 7.7 ppb

Averaged by year, the highest was 8.5 ppb, in 2022, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, its one sample was 7.7 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 7.0 ppb, in 2016.

What handles it

No certification claim covers this compound yet.

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.47ppm

Highest yearly average, 2020 to 2026

2026 average: 0.27 ppm

Averaged by year, the highest was 0.47 ppm, in 2020, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.53 ppm. In 2026, the latest year on file, its two samples averaged 0.27 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.48 ppm, in 2014.

What handles it

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)
  • Nitrate

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: Arsenic (Pentavalent)<=50 ppb Reduction, Lead Reduction

    For: Arsenic, Lead

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

  • NSF/ANSI 58

    Claims: Arsenic (Pentavalent)<=50 ppb Reduction, Lead Reduction, Uranium

    For: Arsenic, Lead, Uranium

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

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. 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

The best water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2026 to June 30, 20260.011 MG/LArchived
Lead and Copper Rule RevisionsThe required inventory of lead service lines was not completed or submitted on time.EPA: LSL InventoryOct. 17, 2024—Unaddressed
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2018 to Sept. 30, 20180.011 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2018 to June 30, 20180.012 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2018 to March 31, 20180.012 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2017 to Dec. 31, 20170.012 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2017 to Sept. 30, 20170.012 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2017 to June 30, 20170.011 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2017 to March 31, 20170.011 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 12 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Arsenic, uranium, total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, chromium (total) and nitrate results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. City of Flatonia’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 Feb. 28, 2020 to Aug. 4, 2026.

Testing your own tap

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

  • Aqua-Tech Laboratories, Inc.

    Austin, TX · about 46 miles

    Certified for bacteria, lead and copper

    (512) 301-9559

  • Edwards Aquifer Research & Data Center, Texas State University

    San Marcos, TX · about 50 miles

    Certified for bacteria

    (512) 245-2329

  • Texas Department of State Health Services Laboratory Services Section

    Austin, TX · about 54 miles

    Certified for bacteria, lead and copper

    (512) 458-7318

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 TX0750002. Rebuilt from EPA data on Oct. 18, 2026.

Nearby

All Texas utilities

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