The Office of Public Works oversees three multi-community systems that collect sanitary sewage and deliver it to the Great Lakes Water Authority wastewater treatment plant in Detroit. The three systems – the Macomb Interceptor Drain Drainage District, the Martin Drain Drainage District and the 8 ½ Mile Relief Drain Drainage District – serves 800,000 residents and businesses in 14 Macomb County communities. Following the completion of repairs on the 15 Mile sewer collapse in the MIDDD system, a comprehensive Master Plan was developed for all drainage districts served by MCPWO. This Master Plan will ensure that the correct resources are deployed to managing the needed repairs to ensure sinkholes no longer happen and that all of the assets serviced by MCPWO are repaired and replaced in a fiscally responsible manner. The Master Plan is also driving significant Combined Sewer Overflow reduction programs within the southeast community drain districts.
If you are a community or consultant looking to obtain data, please reach out to wastewaterwebportal@macombgov.org with your request
8.5 Mile Relief Drain Drainage District
Constructed in the late 1960s as a 28 million gallon Retention Treatment Basin (RTB). The RTB receives flow via gravity and pumped flow and provides screening, settling and skimming with a detention time of 40.5 minutes at peak flow. All flows are treated with sodium hypochlorite to permitted levels.
Located at 23001 Nine Mile Road (at Jefferson), St. Clair Shores, MI 48080
Seven total pumps with a storm event station pump capacity 693,000 gallons per minute (1545 cfs)
Outfall structure and aeration added in early 2000’s; expanding storage to 31 million gallons
In-System Storage added in 2024, increasing capacity by 3.5 million gallons
Services approximately 44,782 residents in Eastpointe & St. Clair Shores with a service area of 4,745 acres.
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Martin Sanitary Diversion District
Located at 22301 Bon Brae, St. Clair Shores, MI 48080
Constructed in the late 1960s as a 8.6 million gallon retention treatment basin (RTB) facility. The RTB is designed as a "gravity flow through" facility which provides 61 minutes of detention time with peak design flows. All flows are treated with sodium hypochlorite to permitted levels.
Flushing, disinfection, diversion chamber and inlet/outlet structures added the late 1970s
Services approximately 69,354 residents in Roseville & St. Clair Shores over a service area of 8,984 acres.
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Macomb Interceptor Drain Drainage District (MIDDD)
Purchased from Detroit Water & Sewage Department (DWSD) in 2010
38 miles of interceptor
Four in-system control structures
Clintondale Pump Station, North Gratiot Pump Station and CS-12 Pump Station
Four odor and corrosion control facilities
Services approximately 600,000 residents in Chesterfield, Clinton Township, Fraser, Harrison Township, Lenox Township, Macomb Township, New Haven, Shelby Township, Sterling Heights, City of Utica and Washington Township.
Twelve member engineering and operations and maintenance staff
Southeast Macomb County Wastewater Disposal System (SEMCWWDS)
System consists of the Violet Pump Station, Bon Heur Pump Station, and Northeast Sanitary Relief Sewer
Violet Pump Station located at 30801 Greater Mack, St. Clair Shores, MI; originally constructed in 1977 with a firm capacity of 8,400 gallons per minute; reconstructed in 2016 with new pumps, backup generator, and odor control system installed
Bon Heur Pump Station located at 26360 Harper, St. Clair Shores, MI; originally constructed in 1980 with a firm capacity of 40,000 gallons per minute; currently under construction to increase capacity to 50,000 gallons per minute
Northeast Sanitary Relief Sewer constructed in 1977, consisting of 25,935 linear feet of pipe ranging from 12 to 54 inches in diameter
Sewer system maps
