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 releases the largest amount of water pollution of any other one 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 ( ) in Milwaukee and at the South Shore ( ) 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.
During the past few years, sewage has been dumped into Lake Michigan either by accident or as a result of sewer overflow. By late March, 2006 the Milwaukee Metropolitan Sewerage District had accidentally dumped 800,000 gallons of sewage into Lake Michigan. The accidents occurred as workers at the Jones Island facility were testing a new computer operating system. Testing was done under the United Water contract.
In June 2011, combined sewers discharged 170.5 million gallons of untreated wastewater to rivers and Lake Michigan.
On April 10, 2013 combined sanitary and storm sewer overflows were again redirected to rivers and Lake Michigan. Diverting combined sewer overflows to waterways is an emergency measure to prevent sewage backups into basements. Officials said the heavy rains caused sewers in the Milwaukee area to spill an estimated 595 million gallons of untreated wastewater to local waterways.
On April 18, 2013 MMSD again initiated a combined sewer overflow per Bill Graffin of MMSD. The overflow included both untreated wastewater and stormwater. Wisconsin DNR estimated the overflow to be 5% untreated sewage.
- Report to Congress: Combined Sewer Overflows to the Lake Michigan Basin, EPA-833-R-07-007 (PDF). Washington, DC 20460: Environmental Protection Agency. September 2007. Retrieved April 2, 2014.
- Stephens, Odin L.; Mengak, Michael T.; Osborn, David; Miller, Karl V. (March 2005). "Using Milorganite to temporarily repel white-tailed deer from food plots" (PDF). Wildlife Management Series (2). WSFR.
- Merritt, Raymond H. (1982). "Historical Report Photographs, Written Historical and Descriptive Data" (PDF). Historic American Engineering Record (National Park Service). Retrieved April 1, 2014.
- Freese, Simon W., P.E.; Sizemore, Deborah Lightfoot. A Century in the Works: 100 Years of Progress in Civil and Environmental Engineering; Freese and Nichols Consulting Engineers 1894-1994 (PDF). p. 44. Retrieved April 2, 2014.
- American Society of Civil Engineers (August 13, 1974). "Regarding designation of the Jones Island plant as a national engineering landmark" (Press release).
- "Environmental Draft Impact Statement: Milwaukee Metropolitan Sewage District; Water Pollution Abatement Program, No. E1S801072DB". Environmental Protection Agency. November 1980. p. V-100. Retrieved April 1, 2014.
- Rain leaves rivers cresting in southeastern Wisconsin; heavy snow hitting north from Milwaukee Journal Sentinel,
- Combined sewer overflows into Milwaukee waterways to end soon
- Milwaukee sewers spilled 595M wastewater gallons
- MMSD releases sewage from combined system because of flooding