Public water system · TX0840021
ActiveGalveston County MUD 12
At a glance
Galveston County MUD 12 (PWSID TX0840021) is an active community water system in Galveston County, Texas. It reports serving 2,900 people through 1,498 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in April 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,900
Service connections
1,498
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Galveston County MUD 12 compare with other water systems in Galveston County?
By EPA's size categories, Galveston County MUD 12 is a small system (501 to 3,300 people). Galveston County has 53 active public water systems. Its population served is about 64% below the county average of 8,159 people per system, and accounts for 0.7% of the 432,405 people reported by systems filed under the county. Across Texas, the 7,078 active systems average 4,789 people each. Nationally, the average active community water system reports serving 6,703 people, so Galveston County MUD 12 is about 57% below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Texas has 4,594 active community water systems, 65% of the state's 7,078 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 1,192 Texas systems (17%) list purchased surface water as their primary source.
Who owns and regulates Galveston County MUD 12?
EPA lists Galveston County MUD 12 as owned by a local government. The TX state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 20 of the 53 active systems in Galveston County (38%) are also owned by a local government.
Does Galveston County MUD 12 have drinking water violations?
EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in April 2026. The violations listed here began between October 2004 and April 2026. By type: 3 public notice, recordkeeping or other, 3 monitoring and reporting, 3 contaminant level above the legal limit, 1 reporting and 1 required treatment not met. The contaminant or rule involved most often is Public Notice (3 of them). EPA lists 9 as resolved and 2 as unaddressed. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-04-02 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-05-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Resolved |
| 2016-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2011-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2009-02-16 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2008-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2005-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2004-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
All 11 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Galveston County MUD 12: frequently asked questions
Who runs Galveston County MUD 12?
Galveston County MUD 12 (PWSID TX0840021) is a community water system owned by a local government. It is regulated by the TX state drinking water program.
How many people does Galveston County MUD 12 serve?
Galveston County MUD 12 reports serving 2,900 people through 1,498 service connections in Galveston County, Texas.
Where does Galveston County MUD 12 get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Galveston County MUD 12 have any drinking water violations?
EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in April 2026. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Galveston County MUD 12's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in April 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.
Where can I find Galveston County MUD 12's water quality report?
As a community water system, Galveston County MUD 12 must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Galveston County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of League City | Galveston | 149,557 | Community | Purchased surface water |
| City of Texas City | Galveston | 61,541 | Community | Purchased surface water |
| City of Galveston | Galveston | 52,326 | Community | Purchased surface water |
| City of Friendswood | Galveston | 43,190 | Community | Purchased surface water |
| Galveston County Wcid 1 | Galveston | 30,399 | Community | Purchased surface water |
| Bolivar Peninsula Sud | Galveston | 18,424 | Community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Galveston County MUD 12, PWSID TX0840021, Texas”, https://aquacensus.com/water-systems/texas/galveston-county-mud-12-tx0840021 (data as of October 1, 2026).