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Public water system record

City of Diboll

Serves Diboll, Angelina County, TX · 5,207 people served

Federal records show 2 health-based violations and 9 monitoring/reporting issues for City of Diboll in the last ten years. The most serious issue in this window was a Total Trihalomethanes (TTHMs) violation that EPA lists as archived, not resolved.

  • TX0030001
  • DIBOLL
  • TX
  • 5,207 served

System profile

Source water Groundwater
ZIP 75941
EPA system ID TX0030001

Verify this system on EPA ECHO →

Health-based violations, last 10 years
2
Resolved
1
Unresolved
0
Archived by EPA
1
Any acute record
No
Monitoring issues, last 10 years
9

Key facts

  • City of Diboll draws water from 5 wells.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2025.
  • Most recent formal enforcement: compliance order with a penalty by Texas, April 2015.
  • Record on file since 1991, with 7 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 73 unknown out of 1,523 service lines.

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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
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
 350 Oct 17, 2024 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
Revised Total Coliform Rule
Monitoring violation
 Jul 1, 2025 Resolved
Public Notice
OTHER
 May 1, 2025 Active
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Resolved
Consumer Confidence Rule
OTHER
 Jul 2, 2024 Resolved
Revised Total Coliform Rule
Monitoring violation
 Aug 1, 2023 Resolved
Lead and Copper Rule
Monitoring and reporting
 Oct 1, 2022 Resolved
Public Notice
OTHER
 Oct 2, 2021 Resolved
Chlorine
Monitoring and reporting
 Apr 1, 2020 Resolved

Full record since 1991

EPA's records for City of Diboll go back to 1991. Before October 19, 2016 they list 7 health-based violations (7 resolved) and 6 monitoring or reporting violations.

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

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2015, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Apr 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.145 mg/L, federal limit 0.08 mg/L (1.8 times the limit)
 Jan 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.133 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 Oct 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.116 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 Jul 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Apr 1, 2014 Resolved
Total Coliform
Contaminant limit exceeded
 Jun 1, 2010 Resolved
Total Coliform
Contaminant limit exceeded
 Mar 1, 2008 Resolved

Enforcement actions

Texas regulators took 1 formal enforcement action against City of Diboll in 2015. The most recent was a compliance order with a penalty in April 2015.

Date By Action Violations covered
Apr 23, 2015 Texas Compliance order with a penalty 5 violations (4 health-based): E. coli, Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

1 incident

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder 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.

Where the water comes from

City of Diboll draws water from 5 wells. It also buys water from City of Lufkin. 1 other community water system buys water from City of Diboll.

Buys water from

Community systems that buy water from it

Annual water quality report

City of Diboll 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