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Fort Bend County MUD 141

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
2,790 people
Connections
930
Water source
Groundwater
Based in
Houston, TX
County
Fort Bend
Owner
Local government
The ZIP code it serves

77583

The short answer

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

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2020.

Arsenic, total trihalomethanes (TTHM), fluoride, haloacetic acids (HAA5), chromium (total), nitrate and uranium: Texas’s own results, samples taken from July 30, 2020 to June 30, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Copper

Comes from pipes, often your own

Above the action level

7.9ppm

90th percentile, 2020

In the latest period, 9 in 10 homes sampled were at or below 7.9 ppm, above EPA’s action level of 1.3 ppm.

What handles it

Above the health goal1

Arsenic

Comes from the source

Above the health goal

4.8ppb

Highest yearly average, 2020 to 2026

2026, one sample: 3.0 ppb

Averaged by year, the highest was 4.8 ppb, in 2023: 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 3.0 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.2 ppb, in 2017.

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

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

24.9ppb

Highest yearly average, 2020 to 2026

2026 average: 4.1 ppb

Averaged by year, the highest was 24.9 ppb, in 2024, below EPA’s legal limit of 80 ppb. Its highest single sample was 43.4 ppb. In 2026, the latest year on file, its two samples averaged 4.1 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 35.9 ppb, in 2019.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.84ppm

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 0.84 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 0.59 ppm, in 2017.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

2.4ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 2.4 ppb, in 2024, below EPA’s legal limit of 60 ppb. Its highest single sample was 4.7 ppb. In 2026, 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 2.4 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

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

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

    For: Copper, Arsenic

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

  • NSF/ANSI 58

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

    For: Copper, Arsenic

    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

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The best reverse osmosis systems, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Lead and Copper RuleA required study or plan for corrosion control was not done on time.EPA: OCCT/SOWT Study/RecommendationApril 1, 2021—Resolved
Lead and Copper RuleA required study or plan for corrosion control was not done on time.EPA: OCCT/SOWT Study/RecommendationMarch 31, 2021—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 2 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Arsenic, total trihalomethanes (TTHM), fluoride, 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. Fort Bend County MUD 141’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 July 30, 2020 to June 30, 2026.

Testing your own tap

Fort Bend County MUD 141’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 Fort Bend County MUD 141 serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Brazoria County Health Department Water Laboratory

    Angleton, TX · about 14 miles

    Certified for bacteria

    (979) 864-1628

  • Eurofins Xenco, LLC -Houston

    Stafford, TX · about 18 miles

    Certified for lead and copper

    (281) 240-4200

  • ALS Laboratory Group, Environmental Services Division – Houston, Texas

    Houston, TX · about 21 miles

    Certified for lead and copper

    (281) 530-5656

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 TX0790451. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Fort Bend County

All Texas utilities

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