KATY, TX · Harris County

MASON CREEK UTILITY DISTRICT Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Texas’s official records. Always confirm current status with Texas before making decisions based on this information.

System facts

System ID (PWSID): TX1010379
System type: Community Water System
Population served: 8,900
Service connections: 2,602
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Regular
—
Nitrate
January 1, 2011 – December 31, 2011
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2006 – June 30, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2006 – March 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2005 – December 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2005 – June 30, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2005 – March 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2004 – June 30, 2004
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2004 – March 31, 2004
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 1992 – November 30, 1992
Archived
Notification, Public
—
Coliform (TCR)
November 1, 1992 – November 30, 1992
Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2011 – December 31, 2011	Monitoring, Regular	Nitrate	—	Resolved
April 1, 2006 – June 30, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2005 – June 30, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2004 – June 30, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2004 – March 31, 2004	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
November 1, 1992 – November 30, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
November 1, 1992 – November 30, 1992	Notification, Public	Coliform (TCR)	—	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

March 2, 2020State Violation/Reminder Notice2 linked violations
December 11, 2017State Public Notification received2 linked violations
October 24, 2017State Violation/Reminder Notice2 linked violations
October 5, 2017State Compliance achieved2 linked violations
October 21, 2016State Compliance achieved2 linked violations
March 17, 2016State Compliance achieved2 linked violations
November 18, 2015State Public Notification requested2 linked violations
July 17, 2014State Compliance achieved3 linked violations
July 7, 2014State Public Notification received2 linked violations
June 27, 2014State Compliance achieved2 linked violations
May 20, 2014State Violation/Reminder Notice1 linked violation
February 26, 2014State Violation/Reminder Notice1 linked violation
November 13, 2013State Violation/Reminder Notice1 linked violation
July 9, 2010State Compliance achieved14 linked violations
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Public Notification requested1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Violation/Reminder Notice1 linked violation
July 19, 2007State Public Notification requested1 linked violation

Contact

CONNOLLY, BRIAN

281-578-7272

KATY, TX 77450-2022