Public water system record
Sienna MUD 3
Serves Sienna, Fort Bend County, TX · 7,365 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Sienna MUD 3 in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Sienna MUD 3 buys its water from Sienna Regional MUD.
- Lead pipe inventory: 0 lead and 0 unknown out of 2,459 service lines.
Check whether Sienna MUD 3 serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Where the water comes from
Sienna MUD 3 buys its water from Sienna Regional MUD. It lists no wells or intakes of its own.
Buys water from
- Sienna Regional MUD Sugar Land, TX
Annual water quality report
Sienna MUD 3 must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Texas.
Certified drinking water labs by state EPA guidance for private wells