The Wastewater Treatment Plant, built in 1982, is located nine miles north of the city in Weld County and treats an average of 3.5 million gallons of wastewater each day, but is capable of handling almost twice that amount. Treating wastewater is essential to protecting public health, while sustaining water suitable for aquatic life, agriculture, recreational use and the drinking water supply down stream.
About 10,000 tests are performed each year as wastewater travels through the various stages of treatment and discharge to ensure it meets all requirements of the Clean Water Act. During spring and summer months, effluent, or treated water flowing out of the plant, discharges out of Bull Reservoir, primarily into Bull Canal for crop irrigation. Some effluent releases into Big Dry Creek, eventually merging into the South Platte River.