The Flaxville aquifer is present in the northern and central parts of the Fort Peck Indian Reservation and consists of sand and gravel that forms extensive plateaus and topographic benches used for dryland farming. Because many residents rely on groundwater as their primary water supply on the Reservation, the Flaxville and underlying aquifers are important sources of groundwater. The goal of this project is to better understand the possible changes in groundwater quality in the Flaxville and underlying aquifers as a result of changing land use and land management practices as related to farming and energy development. Well inventory and reconnaissance work will take place over the summer of 2019. Water quality samples will be collected over the course of 2020-2021.