10/20/2026
Ever wonder what actually keeps Great Lakes water from being piped, trucked, or shipped away to the highest bidder? It’s a farsighted agreement called the Great Lakes Compact, signed in 2008 by all eight Great Lakes states (plus Ontario and Quebec).
A great short piece from WXPR’s Field Notes breaks it down. The Compact protects not just the lakes themselves but their entire watersheds - the land that drains into them. One of its most important rules: with only the rarest exceptions, water can’t be diverted out of the Great Lakes basin into another watershed. That matters a lot in Wisconsin, where about 20% of the state sits in the Great Lakes watershed, separated from the Mississippi basin by a subcontinental divide you’d hardly notice on our flat terrain.
The piece walks through two real cases that tested the rules - Waukesha’s approved diversion for a community straddling the basin line, and a bottling proposal up north that was ultimately blocked. It’s a clear, quick look at the quiet agreement doing a lot of work to keep this water where it belongs.
Several decades ago, some forward-thinking politicians and water resource specialists created the Great Lakes Compact, a legally binding interstate compact with protections for the use and transfer of the waters of the Great Lakes and signed in 2008 by the governors of Minnesota, Wisconsin, Michigan...