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Public water system record

Crosby MUD

Serves Crosby, Harris County, TX · 5,130 people served

Federal records show 1 health-based violation and 3 monitoring/reporting issues for Crosby MUD in the last ten years. The most serious issue in this window was a resolved Interim Enhanced Surface Water Treatment Rule violation.

  • TX1010118
  • CROSBY
  • TX
  • 5,130 served

System profile

Source water Surface water
ZIP 77532
EPA system ID TX1010118

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
3

Key facts

  • Crosby MUD draws water from 2 wells and 1 surface water intake.
  • Most recent formal enforcement: compliance order with a penalty by Texas, November 2005.
  • Record on file since 1992, with 7 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 1,500 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
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 Oct 1, 2025 Resolved Yes

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Public Notice
OTHER
 Dec 1, 2025 Active
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.
Lead and Copper Rule
Monitoring and reporting
 Jul 1, 2025 Resolved

Full record since 1992

EPA's records for Crosby MUD go back to 1992. Before October 19, 2016 they list 7 health-based violations (7 resolved) and 8 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 1
2000s 7 4
2010 to October 18, 2016 0 3
2020s 1 3

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began January 2005, Resolved.

Show all 7 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.102 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Jan 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
 Jan 1, 2005 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Nov 1, 2004 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Nov 1, 2004 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.08 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 Oct 1, 2004 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
 Jul 1, 2004 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jul 1, 2004 Resolved

Enforcement actions

Texas regulators took 1 formal enforcement action against Crosby MUD in 2005. The most recent was a compliance order with a penalty in November 2005.

Date By Action Violations covered
Nov 24, 2005 Texas Compliance order with a penalty 5 violations (5 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)

What the violations mean

Interim Enhanced Surface Water Treatment Rule

1 incident

The system did not meet a filtration or treatment requirement for surface water

Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through

Where the water comes from

Crosby MUD draws water from 2 wells and 1 surface water intake. It also buys water from San Jacinto River Authority Highlands.

Buys water from

  • San Jacinto River Authority Highlands Conroe, TX

Annual water quality report

Crosby 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