Welcome

Triunfo Water & Sanitation District

We provide sewage collection and treatment services, supply potable water, and treat and sell recycled water. We serve more than 30,000 people in east Ventura County, including Oak Park, Lake Sherwood, Bell Canyon, and the Westlake Village and North Ranch portions of Thousand Oaks.

What's the Latest

May 1, 2023, is the Last Day to Sign Up for Waste Water Customer Assistance Program.

Workshop and class lineup just announced! Classes start Saturday, May 20th.

Attention Oak Park USD Students... Enter the 2024 Student Art Contest! Artwork Deadline May 22.

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Urban Water Management Plan

Triunfo's Urban Water Management Plan provides details on the District's sources of supply, water use history and targets, and drought response measures.

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An innovative solution to regulatory challenges that will help ensure a reliable long-term local water supply.

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FACILITY TOURS

Water Customer Assistance

Eligible customers can receive a $15 discount on their monthly water bill.

POTABLE WATER

And eligible customers can receive a $180 discount on their annual wastewater service.

WASTEWATER

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Water News

Stay in the loop with news, events, conservation tips and more!

Triunfo News

Reminder to Water Customers: Create your New Customer Bill Pay Portal Account

February 25, 2026

LATE FEE NOTICE: Your account may have been charged a late fee in February. We observed an unusually high number of late fees in February. This may have occurred because some customers did not see our previous notifications about the new portal (sent by email,...

Triunfo Water & Sanitation District 2025 Year in Review

February 5, 2026

Message from the Board Chair As we close out another year at Triunfo Water & Sanitation District, I want to take a moment to reflect on our progress, recognize the dedication of our staff, and look ahead to a strong and resilient future for our...

2026 MWD Calendar Now Accepting Submissions

February 4, 2026

Calling all Oak Park K–12 artists! We're inviting local students to show what "Being Water Wise Is…” through original, water-themed artwork for the Metropolitan Water District of Southern California’s annual calendar contest. Selected art could be featured in a professionally printed calendar and digital gallery—plus students...

Customer Bill Pay Portal is Live

January 29, 2026

The new and improved Customer Bill Pay Portal is now live. We made these necessary upgrades to provide a more reliable and secure way to manage your account and pay your water bill. ONLINE BILL PAY* You can now access One-Time Payment AND your Customer...

SAVE WATER, SAVE MONEY!

Apply for cash rebates on purchases of approved water conservation appliances and devices like:

- Toilets
- Washers
- Irrigation Controllers
- Soil Sensors
- Rain Barrels and more!

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Become a pro at water conservation with our

AUTOMATED METER SYSTEM

- Our Automated Meter System shows your water use in present time.

- Gives you full data and analytics to track and analyze your water usage.

- Set up notification limits on your water usage.

- Be notified if you might have a leak.

My Water Account

Bill Pay

Triunfo Water & Sanitation District offers you a variety of convenient ways to pay your water bill by mail, phone, or online.

PAY NOW

Water Usage

Manage your water usage with up-to-date information on consumption history by month, day, or hour.

CUSTOMER PORTAL

Water Rates

Fees for potable and recycled water include a monthly service charge (based on meter size) and quantity rates.

POTABLE RATES

RECYCLED RATES

Be Water Wise!

Triunfo Water & Sanitation District is committed to the wise use of water. This includes promoting conservation among our customers through usage guidelines, valuable incentives, and public education. Find out how you can help support your community by conserving water!

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