It's actually an interesting regional issue, because the allocation of Great Lakes water is ultimately governed by a treaty with Canada. Taking water out of the Great Lakes watershed is prohibited without being granted by an exception.
This became a local issue in Waukesha, because the town is on the boundary, so they have two water systems, and the one on the Mississippi side got contaminated. They eventually got permission to connect the whole town to the Lake Michigan side, by agreeing to return all of the drain water back to that side.
It's actually an interesting regional issue, because the allocation of Great Lakes water is ultimately governed by a treaty with Canada. Taking water out of the Great Lakes watershed is prohibited without being granted by an exception.
This became a local issue in Waukesha, because the town is on the boundary, so they have two water systems, and the one on the Mississippi side got contaminated. They eventually got permission to connect the whole town to the Lake Michigan side, by agreeing to return all of the drain water back to that side.