Bremen sewer system includes approximately 25 miles of 8-inch to 36-inch pipe and eight lift stations throughout the town. The collection system serves the corporate area of Bremen including residential, commercial and industrial areas.

The Wastewater Treatment Plant is a Class 3, Trickling Filter plant and was placed in operation in 1965. The plant includes two communicators, three raw wastewater pumps, grit removal, three primary settling tanks, two biological oxidation towers, two secondary clarifiers, one rock bed trickling filter used for ammonia oxidation, one final tank, tertiary filters, chlorination and dechlorination process, post aeration tank, one anaerobic sludge digester and sludge drying beds to provide a complete wastewater treatment system.

Along with superintendent Matt Cunningham, also on the Lake of the Woods Regional Sanitation District Board, four full time and one part time employees operate the plant and maintain the collection system 24 hours a day, 7 days a week. Currently Bremen has 2-class 3, 1-class 2 and 1-class 1 employee's that are licensed and certified by the State of Indiana.​​