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...

Water - It's There When You Need It!

Water - It's There When You Need It!

May 01, 2022

It’s that wonderful time of year again where we come together to celebrate National Drinking Water Week! 

Every year, during the first week of May, water professionals across North America celebrate Water and all it provides to our communities and lives. This year’s theme is There When You Need It. 

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