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Starting 12/1/23, Customer Service Hours CHANGED


Effective December 1, 2023: Triunfo Water & Sanitation District’s Customer Service Office will be CLOSED FOR LUNCH, Monday-Friday.


OPEN Monday-Friday:
CLOSED for lunch: 12:00pm-1:30pm

370 N. Westlake Blvd., Ste. 100
Westlake Village, CA 91362


Water Service
Billing questions, customer service
(800) 613-0901

Sewer Service
New construction, connections, tenant improvements, easements
(805) 658-4690

General Inquiries/Board
Board of directors inquiries, meeting agendas, general inquiries
(818) 889-8996

Recent News

TWSD Board Vacancy – Notice & Application – 2024
February 6, 2024
Triunfo Water & Sanitation District (TWSD) Board of Directors plans to appoint a resident of the District to fill a Board vacancy. SEE NOTICE for complete...
Triunfo Water & Sanitation District 2023 Year in Review
January 30, 2024
As we close our year, 2023 Chair of the Triunfo Water & Sanitation District Jane Nye shares her thoughts. It is a pleasure serving the...
Board Member Janna Orkney Steps Down
January 30, 2024

After 17 years as a member of the Triunfo Water and Sanitation District (TWSD) Board of Directors and its current board chair, Janna Orkney announced…

Artwork by Oak Park Sixth Grader Selected to Appear in 2024 Calendar
December 20, 2023

December 20, 2023 — Artwork by 11-year-old Jessica Joel, a sixth grader at Medea Creek Middle School in Oak Park, was selected by the Metropolitan…