Public water system · TX0790452
ActiveSienna MUD 10
At a glance
Sienna MUD 10 (PWSID TX0790452) is an active community water system in Fort Bend County, Texas. It reports serving 7,824 people through 2,616 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; none is health-based, and the most recent began in November 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,824
Service connections
2,616
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Sienna MUD 10 compare with other water systems in Fort Bend County?
By EPA's size categories, Sienna MUD 10 is a medium system (3,301 to 10,000 people). Fort Bend County has 287 active public water systems. Its population served is about 148% above the county average of 3,155 people per system, and accounts for 0.9% of the 905,329 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 Sienna MUD 10 is about 17% above 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 groundwater means the system buys groundwater from another public water system rather than drawing its own. 302 Texas systems (4.3%) list purchased groundwater as their primary source.
Who owns and regulates Sienna MUD 10?
EPA lists Sienna MUD 10 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. 157 of the 287 active systems in Fort Bend County (55%) are also owned by a local government.
Does Sienna MUD 10 have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in November 2025. The violations listed here began between January 2013 and November 2025. By type: 3 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2025-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2013-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2013-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
All 4 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.
Sienna MUD 10: frequently asked questions
Who runs Sienna MUD 10?
Sienna MUD 10 (PWSID TX0790452) is a community water system owned by a local government. It is regulated by the TX state drinking water program.
How many people does Sienna MUD 10 serve?
Sienna MUD 10 reports serving 7,824 people through 2,616 service connections in Fort Bend County, Texas.
Where does Sienna MUD 10 get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Sienna MUD 10 have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in November 2025. 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 Sienna MUD 10'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 4 violations for this system; none is health-based, and the most recent began in November 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the TX state drinking water program.
Where can I find Sienna MUD 10's water quality report?
As a community water system, Sienna MUD 10 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 Fort Bend County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Sugar Land | Fort Bend | 90,909 | Community | Surface water |
| Fort Bend County Wcid 2 | Fort Bend | 49,173 | Community | Surface water |
| City of Rosenberg | Fort Bend | 43,158 | Community | Purchased surface water |
| City of Fulshear | Fort Bend | 34,000 | Community | Groundwater |
| City of Richmond | Fort Bend | 25,326 | Community | Surface water |
| Fort Bend County MUD 30 | Fort Bend | 16,794 | 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, “Sienna MUD 10, PWSID TX0790452, Texas”, https://aquacensus.com/water-systems/texas/sienna-mud-10-tx0790452 (data as of October 1, 2026).