Jamestown's wastewater treatment plant is located on the Bloom exit of Interstate 94 and is noticeable by the burning methane at night. The wastewater plant insures public health by properly treating and discharge of treated water to the James River. The department also monitors the discharge into river for the North Dakota Department of Health. The plant treats an average of 2.7 million gallons of water a day. It has the capacity to treat 4.5 million gallons of water a day.
The department treats the water from all of the city's sewage and the water from Cavendish Farms, for which the plant was built. The plant is heated via methane gas which is produced from the high strength potato waste. The treatment plant is staffed with four people and also features a certified lab.