Groundwater is a big deal. That much is clear. When 75% of Minnesotans turn on the tap, groundwater comes out. About 30% of the world’s freshwater is groundwater. And plentiful, clean water is a key component of Minnesotan identity, even as lake levels drop, wells run dry, and seasonal floods cost the state millions of dollars. Post by Ariel Herrod, Watershed Sustainability Program Coordinator.