Harmony Grove Okee WWTP - Advanced Wastewater Treatment in Town of Dekorra, Wisconsin

Harmony Grove Okee WWTP is an advanced wastewater treatment facility located on Hooker Road in the Town of Dekorra, Columbia County, Wisconsin. The plant serves a population of approximately 5,781 residents and is part of the municipal wastewater infrastructure for the area. The plant provides advanced treatment, which goes beyond secondary treatment to remove nutrients and other pollutants. With a designed capacity of 1,688.29 million gallons per year and an actual discharge volume of 529.96 million gallons per year, the facility operates well within its capacity. As a US plant, it is subject to the Clean Water Act and operates under an NPDES permit issued by the Wisconsin Department of Natural Resources, which sets effluent limits to protect water quality. The treated effluent is discharged into a local water body that eventually drains to the Wisconsin River, a major tributary of the Mississippi River. The Mississippi River system supports diverse aquatic life and is an important migratory corridor for birds and fish. The advanced treatment helps minimize nutrient loading, reducing the risk of eutrophication in downstream waters.

The plant discharges into a receiving water body that flows into the Wisconsin River, which joins the Mississippi River near Prairie du Chien. The Mississippi River is a major ecological corridor supporting diverse fish, mussel, and bird species. Advanced treatment at this plant helps control nutrient pollution, protecting downstream aquatic habitats and reducing the risk of algal blooms in the Mississippi River basin.