Milwaukee Metropolitan Sewerage District
The Milwaukee Metropolitan Sewerage District (MMSD) is a state-chartered government agency which provides wastewater services for 28 municipalities within Milwaukee County and also portions of the surrounding counties. It treats, and also releases, the largest amount of water pollution of any agency or company in the State of Wisconsin.
With headquarters and a central laboratory along the Menomonee River near downtown Milwaukee, it has two wastewater treatment plants which are located at Jones Island (43°01′23.5″N 87°53′58″W / 43.023194°N 87.89944°W) in Milwaukee and at the South Shore (42°53′16″N 87°50′44″W / 42.88778°N 87.84556°W) in Oak Creek. These facilities were operated by United Water under a 10-year agreement ending March 1, 2008. Veolia Water is the current operator.
"The world’s first large scale wastewater treatment plant was constructed on Jones Island, near the shore of Lake Michigan." The primary wastewater treatment plant at Jones Island was one of the first of its kind when the original activated sludge plant was constructed in 1925. MMSD was the first to market biosolids created through this process as a fertilizer under the name "Milorganite." The Jones Island Plant was among the first sewage treatment plants in the United States to succeed in using the activated sludge treatment process. "It was the first treatment facility to economically dispose of the recovered sludge by producing an organic fertilizer." In the early 1980s the plant needed extensive reworking, "this does not detract from its historic significance as a pioneering facility in the field of pollution control technology." It had the largest capacity of any plant in the world when constructed. The 1925 plant has been designated as a Historic Civil Engineering Landmark by the American Society of Civil Engineers.
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