Sanitary Sewer

Winona Wastewater Treatment Plant Facilities Plan

This Facilities Plan has been prepared for the City to aid the community in providing adequate wastewater treatment that meets current and future needs. The facilities plan addresses the operational limitations and condition issues identified in previous studies.


The City of Winona Wastewater Treatment Plant serves the needs of the City of Winona and also of the City of Goodview. From 1997 to 1999, the plant was upgraded at a cost of approximately $5 million. 

The current plant has a design capacity of 9.6 MGD (million gallons per day), which allows room for current and future expansion. Winona’s Wastewater Treatment Plant utilizes a trickling filter with activated sludge system to process influent. Treated sludge and wastewater are then discharged in accordance with the Plant’s permit. 

Some of the industries in Winona have large discharge requirements which do not fit the standard profile for smaller dischargers. These customers are served through special agreements with the Industrial Pre-Treatment area which allow handling these special discharges without compromising the operation of the plant.