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Public water system record

Wilco Water

Serves an area of Brazoria County, TX · 243 people served

Federal records show 9 health-based violations and 11 monitoring/reporting issues for Wilco Water 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.

  • TX0200083
  • CYPRESS
  • TX
  • 243 served

System profile

Source water Groundwater
ZIP 77429
EPA system ID TX0200083

Verify this system on EPA ECHO →

Health-based violations, last 10 years
9
Resolved
4
Unresolved
0
Archived by EPA
5
Any acute record
No
Monitoring issues, last 10 years
11

Key facts

  • Wilco Water draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.099 mg/L, federal limit 0.08 mg/L (1.2 times the limit), 2025.
  • Most recent formal enforcement: compliance order with a penalty by Texas, May 2025.
  • Record on file since 1991, with 0 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 82 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 0.099 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jul 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.098 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Apr 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jan 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 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 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jul 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2024 Resolved No
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, 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 Jul 1, 2023 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, 2023 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Public Notice
OTHER
 Jul 10, 2025 Resolved
Public Notice
OTHER
 Apr 29, 2025 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Apr 8, 2025 Resolved
Public Notice
OTHER
 Dec 7, 2024 Resolved
Public Notice
OTHER
 Oct 11, 2024 Resolved
Public Notice
OTHER
 Jun 27, 2024 Resolved
Public Notice
OTHER
 Apr 24, 2024 Resolved
Public Notice
OTHER
 Feb 2, 2024 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Sep 7, 2023 Resolved
Public Notice
OTHER
 Jan 4, 2019 Resolved
Chlorine
Monitoring and reporting
 Jul 1, 2017 Resolved

Full record since 1991

EPA's records for Wilco Water go back to 1991. Before October 19, 2016 they list no health-based violations and 4 monitoring or reporting violations.

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

Enforcement actions

Texas regulators took 1 formal enforcement action against Wilco Water in 2025. The most recent was a compliance order with a penalty in May 2025.

Date By Action Violations covered
May 27, 2025 Texas Compliance order with a penalty 8 violations (8 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

9 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Wilco Water draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).

Annual water quality report

Wilco Water 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.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Wilco Water for a copy.

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