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Blue Medina Water

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
243 people
Connections
81
Water source
Groundwater
Based in
Austin, TX
County
Bandera
Owner
Private
The ZIP code it serves

78063

The short answer

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

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 1995 to 2025.

Total trihalomethanes (TTHM), arsenic, fluoride, chromium (total), nitrate, haloacetic acids (HAA5) and uranium: Texas’s own results, samples taken from Jan. 14, 2020 to May 11, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Total trihalomethanes (TTHM)

Forms or is added in treatment

Above the legal limit

47.3ppb

Highest yearly average, 2020 to 2026

2026 average: 5.3 ppb

Averaged by year, the highest was 47.3 ppb, in 2022, below EPA’s legal limit of 80 ppb. Its highest single sample was 144 ppb. In 2026, the latest year on file, its four samples averaged 5.3 ppb. EPA judges this limit at each sampling point, and recorded a violation for total trihalomethanes (TTHM) at this utility in 2022. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 27.6 ppb, in 2018.

What handles it

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

Above the health goal2

Arsenic

Comes from the source

Above the health goal

1.4ppb

Highest yearly average, 2021 to 2025

2025: not found

Averaged by year, the highest was 1.4 ppb, in 2022: below EPA’s legal limit of 10 ppb, but above its health goal of zero. Its highest single sample was 2.8 ppb. In 2025, 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 1.1 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”

Lead

Comes from pipes, often your own

Above the health goal

0.4ppb

90th percentile, 2023 to 2025

In the latest period, 9 in 10 homes sampled were at or below 0.4 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

Below EPA’s limits4

Fluoride

Forms or is added in treatment

Below EPA’s limits

2.8ppm

Highest yearly average, 2021 to 2025

2025 average: 2.8 ppm

Averaged by year, the highest was 2.8 ppm, in 2022, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 2.9 ppm. In 2025, the latest year on file, its two samples averaged 2.8 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 3.0 ppm, in 2015.

What handles it

Chromium (total)

Comes from the source

Below EPA’s limits

13.3ppb

Highest yearly average, 2021 to 2025

2025: not found

Averaged by year, the highest was 13.3 ppb, in 2022, below EPA’s legal limit of 100 ppb. Its highest single sample was 14.7 ppb. In 2025, the latest year on file, it wasn’t found in any of its two samples.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.54ppm

Highest sample; found in 20 of 21

2026 average: 0.23 ppm

The highest sample, in 2020, was 0.54 ppm, below EPA’s legal limit of 10 ppm. In 2026, the latest year on file, its three samples averaged 0.23 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 1.1 ppm, in 2017.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

2.9ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 2.9 ppb, in 2022, below EPA’s legal limit of 60 ppb. Its highest single sample was 9.0 ppb. In 2026, the latest year on file, it wasn’t found in any of its four samples. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 36.9 ppb, in 2016.

What handles it

No certification claim covers this compound yet.

One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • 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: Trihalomethanes (TTHM) Reduction, Arsenic (Pentavalent)<=50 ppb Reduction, Lead Reduction

    For: Total trihalomethanes (TTHM), Arsenic, Lead

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

  • NSF/ANSI 58

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

    For: Total trihalomethanes (TTHM), Arsenic, Lead

    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

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Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2022 to Dec. 31, 20220.09 MG/LResolved
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2022 to Sept. 30, 20220.098 MG/LResolved
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2022 to June 30, 20220.096 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), arsenic, fluoride, chromium (total), nitrate, haloacetic acids (HAA5) and uranium results here are Texas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Blue Medina Water’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 May 11, 2026.

Testing your own tap

Blue Medina Water’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 Blue Medina Water serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Alamo Analytical Laboratories, Ltd.

    San Antonio, TX · about 28 miles

    Certified for lead and copper

    (210) 340-8121

  • San Antonio Testing Laboratory, LLC

    San Antonio, TX · about 30 miles

    Certified for bacteria, lead and copper

    (210) 229-9920

  • Wallgren Environmental Services dba Pollution Control Services

    Universal City, TX · about 38 miles

    Certified for bacteria, lead and copper

    (210) 340-0343

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 TX0100030. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Bandera County

All Texas utilities

What to do next