Welcome to the Official Website of Mni Wašté Water Company

The Mni Wašté Water Company is a tribally chartered entity and serves 14,000 members within the Dewey and Ziebach counties on the Cheyenne River Lakota Reservation in South Dakota.

Bill Payment Options

Looking for the most convenient way to pay your bill? We offer a wide variety of payment options to our customers. Simply choose the option that best suits your needs... Learn more...

Celebrating Clean Water: Honoring Drinking Water Week

Celebrating Clean Water: Honoring Drinking Water Week

April 30, 2025

Every time you turn on the tap, clean and safe water flows out.. ready to drink, cook with, or use for daily tasks.

It’s a simple action we often take for granted, but behind every drop is a vast system of infrastructure, dedicated professionals, and careful planning.

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