Public water system · TX1011430
ActiveHarris County MUD 157
At a glance
Harris County MUD 157 (PWSID TX1011430) is an active community water system in Harris County, Texas. It reports serving 13,062 people through 4,354 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; all are health-based, and the most recent began in July 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
13,062
Service connections
4,354
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Harris County MUD 157 compare with other water systems in Harris County?
By EPA's size categories, Harris County MUD 157 is a large system (10,001 to 100,000 people). Harris County has 1,246 active public water systems. Its population served is about 169% above the county average of 4,849 people per system, and accounts for 0.2% of the 6,041,784 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 Harris County MUD 157 is about twice 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 Harris County MUD 157?
EPA lists Harris County MUD 157 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. 508 of the 1,246 active systems in Harris County (41%) are also owned by a local government.
Does Harris County MUD 157 have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in July 2015. The violations listed here began between April 2015 and July 2015. By type: 2 contaminant level above the legal limit. The contaminant or rule involved most often is Arsenic (2 of them). EPA lists 2 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2015-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
All 2 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.
Harris County MUD 157: frequently asked questions
Who runs Harris County MUD 157?
Harris County MUD 157 (PWSID TX1011430) is a community water system owned by a local government. It is regulated by the TX state drinking water program.
How many people does Harris County MUD 157 serve?
Harris County MUD 157 reports serving 13,062 people through 4,354 service connections in Harris County, Texas.
Where does Harris County MUD 157 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 Harris County MUD 157 have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in July 2015. 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 Harris County MUD 157'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 2 violations for this system; all are health-based, and the most recent began in July 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.
Where can I find Harris County MUD 157's water quality report?
As a community water system, Harris County MUD 157 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 Harris County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Houston | Harris | 2,970,543 | Community | Surface water |
| City of Pasadena | Harris | 152,000 | Community | Purchased surface water |
| Clear Lake City Water Authority | Harris | 89,702 | Community | Purchased surface water |
| City of Baytown | Harris | 86,004 | Community | Purchased surface water |
| City of Houston Ud 5 - Kingwood | Harris | 80,073 | Community | Groundwater |
| Harris County MUD 165 | Harris | 40,503 | 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, “Harris County MUD 157, PWSID TX1011430, Texas”, https://aquacensus.com/water-systems/texas/harris-county-mud-157-tx1011430 (data as of October 1, 2026).