The Dakota Water Resources Act Amendments of 2026 would update a decades-old law governing water supply projects in North Dakota and South Dakota by authorizing significant additional federal funding to complete several major water infrastructure projects. The bill provides roughly $637 million for non-tribal projects, including the Northwest Area Water Supply system, the Eastern North Dakota Alternate Water Supply Project, the Southwest Pipeline Project, and various rural water district improvements. It also authorizes about $743 million for tribal water systems serving the Spirit Lake, Three Affiliated Tribes (Fort Berthold), Standing Rock, and Turtle Mountain reservations, along with funding for a feasibility study on a new water system for the Lake Traverse Reservation. The legislation allows some flexibility to shift funds between related projects, sets a two-year deadline for completing engineering reports on several of these efforts, and adjusts funding amounts over time to account for rising construction costs. Overall, the bill primarily benefits rural communities, municipalities, and Native American tribes in the Dakotas by helping ensure reliable access to clean drinking water and supporting long-delayed infrastructure projects.