You know the song: “Rain, rain, go away/Come again some other day.”

Heavy rain in places with older sewer systems (Michigan and elsewhere), often results in combined sewage overflows. But it doesn’t have to be that way. And the solution doesn’t have to cost billions of dollars.

First off, combined sewage systems are problematic because they take in sanitary sewage (toilet) in the same pipes as stormwater runoff (manhole). When it rains, water that runs off of impervious surfaces like rooftops and parking lots can overwhelm combined systems.

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