Public water system · TX0570186
ActiveDallas County MUD 4
At a glance
Dallas County MUD 4 (PWSID TX0570186) is an active community water system in Dallas County, Texas. It reports serving 150 people through 50 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
150
Service connections
50
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Dallas County MUD 4 compare with other water systems in Dallas County?
By EPA's size categories, Dallas County MUD 4 is a very small system (500 people or fewer). Dallas County has 35 active public water systems. Its population served is well below the county average of 90,969 people per system, and accounts for less than 0.1% of the 3,183,922 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 Dallas County MUD 4 is well 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 Dallas County MUD 4?
EPA lists Dallas County MUD 4 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. 31 of the 35 active systems in Dallas County (89%) are also owned by a local government.
Does Dallas County MUD 4 have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Dallas County MUD 4. For the latest compliance status, check EPA ECHO for current compliance history.
Dallas County MUD 4: frequently asked questions
Who runs Dallas County MUD 4?
Dallas County MUD 4 (PWSID TX0570186) is a community water system owned by a local government. It is regulated by the TX state drinking water program.
How many people does Dallas County MUD 4 serve?
Dallas County MUD 4 reports serving 150 people through 50 service connections in Dallas County, Texas.
Where does Dallas County MUD 4 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 Dallas County MUD 4 have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Dallas County MUD 4'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.
Where can I find Dallas County MUD 4's water quality report?
As a community water system, Dallas County MUD 4 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 Dallas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dallas Water Utility | Dallas | 1,356,479 | Community | Surface water |
| City of Irving | Dallas | 264,546 | Community | Purchased surface water |
| City of Garland | Dallas | 248,822 | Community | Purchased surface water |
| City of Grand Prairie | Dallas | 201,843 | Community | Purchased surface water |
| Dallas Fort Worth International Airport | Dallas | 177,673 | Non-transient non-community | Purchased surface water |
| City of Mesquite | Dallas | 152,020 | Community | Purchased surface water |
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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, “Dallas County MUD 4, PWSID TX0570186, Texas”, https://aquacensus.com/water-systems/texas/dallas-county-mud-4-tx0570186 (data as of October 1, 2026).