Main Line Break
There has been a main line break in the south part of Sienna.
Crews are in route to make repairs. Residents in Sienna 4 and Sienna 6 may experience low pressure until repairs are complete.
If you have any questions, please reach out to Si Environmental at 832-490-1601.
Tax Transparency
Information about the District required by Section 26.18, Texas Tax Code, created by Senate Bill 2 (also known as the Texas Property Tax Reform and Transparency Act of 2019), is available below:
Welcome to the new website for Sienna MUDs
Through this website you can find important resources for these districts in Sienna:
- Sienna Municipal Utility District No. 2
- Sienna Municipal Utility District No. 3
- Sienna Municipal Utility District No. 4
- Sienna Municipal Utility District No. 5
- Sienna Municipal Utility District No. 6
- Sienna Municipal Utility District No. 10
- Sienna Municipal Utility District No. 12
- Sienna Management District
- Sienna Regional Municipal Utility District
Upcoming Meetings
Tuesday, May 19, 2026 at 1:00 PM
Suite 2400, Guadalupe Room
The Board meets the third Tuesday of each month at the offices of Allen Boone Humphries Robinson LLP, 3200 Southwest Freeway, 24th Floor, Guadalupe Room. Meetings generally begin at 1:00 p.m. and are open to the public.
The Board welcomes and encourages District residents to attend.