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...

Time to Celebrate Drinking Water Week!

Time to Celebrate Drinking Water Week!

May 01, 2023

We have been celebrating Drinking Water Week for over 40 years!

Hosted by the American Water Works Association, Drinking Water Week is a time to recognize the vital role water plays in the daily lives of every individual.

In 2023, Drinking Water Week will be recognized from May 7th – May 13th. During this time, water teams across the United States, Canada, and beyond proudly educate their communities on the amazing processes and science needed to create 1 “simple” glass of water.

Read the full article »