The Rib Mountain Metropolitan Sewerage District (RMMSD), while located in the Village of Rib Mountain, is not part of the local government of the Village of Rib Mountain. Instead, it is a single-purpose Municipal Corporation whose sole duty is to be a regional waste water treatment facility in accordance with Chapter 200 of the Wisconsin State Statutes.
This facility was built in 1985 to treat the waste water from the Village of Weston, the Village of Rothschild, the Village of Kronenwetter, City of Mosinee and the Village of Rib Mountain.
The (Metro) RMMSD is governed by a 5 Member appointed Commission.