Tap Truth EPA drinking water records, in plain English

Public water system record

Sebastian MUD

Serves Sebastian, Willacy County, TX · 1,884 people served

Federal records show 1 health-based violation and 14 monitoring/reporting issues for Sebastian MUD in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

  • TX2450006
  • SEBASTIAN
  • TX
  • 1,884 served

System profile

Source water Surface water
ZIP 78594
EPA system ID TX2450006

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
0
Unresolved
1
Any acute record
No
Monitoring issues, last 10 years
14

Key facts

  • Sebastian MUD draws water from 1 surface water intake.
  • Most recent formal enforcement: compliance order with a penalty by Texas, February 2006.
  • Record on file since 1993, with 3 health-based violations before October 19, 2016.

Check whether Sebastian MUD serves your address

Address suggestions by Mapbox

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 Active No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Nov 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Consumer Confidence Rule
OTHER
 Jul 1, 2025 Active
Public Notice
OTHER
 May 1, 2025 Resolved
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Active
CARBON, TOTAL
Monitoring and reporting
 Jul 1, 2024 Resolved
Public Notice
OTHER
 Aug 1, 2021 Resolved
Public Notice
OTHER
 Jan 11, 2021 Resolved
Public Notice
OTHER
 Jan 11, 2021 Resolved
Revised Total Coliform Rule
Monitoring violation
 Jul 1, 2020 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Dec 1, 2019 Resolved
Surface Water Treatment Rule
Monitoring and reporting
 Dec 1, 2019 Resolved
Revised Total Coliform Rule
Monitoring violation
 Nov 1, 2019 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Nov 1, 2019 Resolved
Surface Water Treatment Rule
Monitoring and reporting
 Nov 1, 2019 Resolved

Full record since 1993

EPA's records for Sebastian MUD go back to 1993. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 23 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 2
2000s 3 15
2010 to October 18, 2016 0 6
October 19, 2016 to 2019 0 5
2020s 1 9

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2004, Resolved.

Show all 3 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Oct 1, 2004 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
 Oct 1, 2004 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jul 1, 2004 Resolved

Enforcement actions

Texas regulators took 1 formal enforcement action against Sebastian MUD in 2006. The most recent was a compliance order with a penalty in February 2006.

Date By Action Violations covered
Feb 5, 2006 Texas Compliance order with a penalty 3 violations (3 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)

What the violations mean

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.

Where the water comes from

Sebastian MUD draws water from 1 surface water intake. It also has an emergency connection to North Alamo WSC.

Emergency or part-time connections to

Annual water quality report

Sebastian MUD 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