Tap Truth EPA drinking water records, in plain English

Public water system record

City of Hamilton

Serves Hamilton, Hamilton County, TX · 2,895 people served

Federal records show 6 health-based violations and 5 monitoring/reporting issues for City of Hamilton in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • TX0970001
  • HAMILTON
  • TX
  • 2,895 served

System profile

Source water Purchased surface water
ZIP 76531
EPA system ID TX0970001

Verify this system on EPA ECHO →

Health-based violations, last 10 years
6
Resolved
6
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
5

Key facts

  • City of Hamilton buys its water from Upper Leon River MWD.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.101 mg/L, federal limit 0.08 mg/L (1.3 times the limit), 2024.
  • Most recent formal enforcement: compliance order with a penalty by Texas, October 2024.
  • Record on file since 2005, with 2 health-based violations before October 19, 2016.
  • Lead pipe inventory: 48 lead and 67 unknown out of 844 service lines.

Check whether City of Hamilton 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
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.101 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Apr 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.099 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jan 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Oct 1, 2023 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 Jul 1, 2023 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Apr 1, 2023 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
Monitoring and reporting
 Dec 30, 2024 Resolved
Public Notice
OTHER
 Dec 17, 2024 Resolved
Public Notice
OTHER
 Mar 5, 2024 Resolved
Lead and Copper Rule
Monitoring and reporting
 Dec 30, 2016 Resolved

Full record since 2005

EPA's records for City of Hamilton go back to 2005. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 5 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 1 4
2010 to October 18, 2016 1 1
October 19, 2016 to 2019 0 1
2020s 6 4

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began July 2011, Resolved.

Show all 2 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jul 1, 2011 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.114 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
 Jul 1, 2009 Resolved

Enforcement actions

Texas regulators took 1 formal enforcement action against City of Hamilton in 2024. The most recent was a compliance order with a penalty in October 2024.

Date By Action Violations covered
Oct 1, 2024 Texas Compliance order with a penalty 6 violations (6 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

6 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

City of Hamilton buys its water from Upper Leon River MWD. It lists no wells or intakes of its own. 1 other community water system buys water from City of Hamilton.

Buys water from

Community systems that buy water from it

Annual water quality report

City of Hamilton 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