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Public water system record

Llano County MUD 1

Serves an area of Llano County, TX · 747 people served

Federal records show 15 health-based violations and 15 monitoring/reporting issues for Llano County MUD 1 in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.

  • TX1500002
  • HORSESHOE BAY
  • TX
  • 747 served

System profile

Source water Surface water
ZIP 78657
EPA system ID TX1500002

Verify this system on EPA ECHO →

Health-based violations, last 10 years
15
Resolved
15
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
15

Key facts

  • Llano County MUD 1 draws water from 1 surface water intake.
  • Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.119 mg/L, federal limit 0.06 mg/L (2 times the limit), 2017.
  • Most recent formal enforcement: compliance order with a penalty by Texas, April 2024.
  • Record on file since 1993, with 2 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 259 service lines.

Check whether Llano County MUD 1 serves your address

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
 350 Oct 17, 2024 Resolved No
Revised Total Coliform Rule
Contaminant limit exceeded
 110 Jun 1, 2022 Resolved Yes
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2022 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Oct 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.102 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Jan 1, 2018 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 220 Jan 1, 2018 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 220 Oct 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.104 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Oct 1, 2017 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.119 mg/L, federal limit 0.06 mg/L (2 times the limit)
 220 Jul 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.134 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 220 Jul 1, 2017 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
 220 Apr 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Apr 1, 2017 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.065 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Jan 1, 2017 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 220 Oct 1, 2016 Resolved No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Consumer Confidence Rule
OTHER
 Jul 1, 2025 Active
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Resolved
Public Notice
OTHER
 Jun 11, 2023 Active
Public Notice
OTHER
 Apr 9, 2023 Active
Public Notice
OTHER
 Jul 7, 2022 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Apr 1, 2022 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Mar 15, 2022 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Mar 1, 2022 Resolved
Public Notice
OTHER
 Oct 29, 2021 Resolved
Public Notice
OTHER
 Apr 8, 2019 Resolved
Public Notice
OTHER
 Apr 8, 2019 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Dec 1, 2018 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Feb 27, 2018 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Feb 27, 2018 Resolved
Consumer Confidence Rule
OTHER
 Jul 1, 2015 Resolved

Full record since 1993

EPA's records for Llano County MUD 1 go back to 1993. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 7 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 2
2000s 1 0
2010 to October 18, 2016 1 5
October 19, 2016 to 2019 9 5
2020s 5 9

Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began October 2016, Resolved.

Show all 2 health-based violations before October 19, 2016
Contaminant Start date Status
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.063 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 Oct 1, 2016 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Oct 1, 2009 Resolved

Enforcement actions

Texas regulators took 3 formal enforcement actions against Llano County MUD 1 and issued 1 boil water order between 2017 and 2024. The most recent was a compliance order with a penalty in April 2024.

Date By Action Violations covered
Apr 9, 2024 Texas Compliance order with a penalty 3 violations (3 health-based): Total Trihalomethanes (TTHMs)
Jul 5, 2022 Texas Boil water order 1 violation (1 health-based): Revised Total Coliform Rule
Feb 19, 2019 Texas Compliance order with a penalty 4 violations (4 health-based): Total Trihalomethanes (TTHMs)
Sep 19, 2017 Texas Compliance order with a penalty 6 violations (5 health-based): Haloacetic Acids (HAA5), Consumer Confidence Rule

What the violations mean

Total Trihalomethanes (TTHMs)

7 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Haloacetic Acids (HAA5)

6 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Revised Total Coliform Rule

1 incident

The system did not meet a requirement of the Revised Total Coliform Rule

Coliform and E. coli rules protect against bacteria in the distribution system

Where the water comes from

Llano County MUD 1 draws water from 1 surface water intake. It also has an emergency connection to City of Horseshoe Bay.

Emergency or part-time connections to

Annual water quality report

Llano County MUD 1 must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Texas.

Certified drinking water labs by state EPA guidance for private wells