The South Dakota Department of Environment and Natural Resources provides an interactive map of groundwater levels at over 1000 observation wells across the state. Users can click on each well for more detailed information, including:

• Aquifer being measured
• Groundwater level over time (graphs and data), with measurements going back many decades
• Total well depth
• Ground elevation
• Lithologic logs and well history

Users can search for specific wells, aquifers, or areas. Water level data for any well can be downloaded for further use and analysis.

Click here to access the interactive map.

Source: South Dakota Department of Environment and Natural Resources