The City's Sanitary Sewer Utility operates an extensive piping network that makes up the wastewater collection system. The sewer system transports all flow from residential, commercial, industrial and tax-exempt properties in La Crosse to the Wastewater Treatment Plant. Additionally, flows from other areas that contract with the City for sewer service are transported through sections of the City's system to the Wastewater Treatment Plant.

The City's Sanitary Sewer Utility operates one large, regional wastewater treatment plan (WWTP) that serves not only City of La Crosse, but also many other customers in the area. The current WWTP utilizes multiple processes to assure reliable operation and performance, resulting in high quality effluent discharged to the Mississippi River.

• The Waste Water Collection System
• The Waste Water Treatment System