Ontario WWTP - Secondary Treatment Facility in Ontario, Wisconsin

Ontario WWTP is a municipal wastewater treatment plant located on South Street in Ontario, Vernon County, Wisconsin. Serving a population of 495, this facility is part of the region's infrastructure for managing domestic wastewater in a rural setting. The plant provides secondary treatment, a standard biological process that removes organic matter and suspended solids. With a designed capacity of 325.54 volume units and an average discharge of 102.21 units, the plant operates under the U.S. Clean Water Act, which requires NPDES permits for such discharges to ensure compliance with water quality standards. The treated effluent from Ontario WWTP enters local streams that flow into the Kickapoo River, a tributary of the Wisconsin River, which ultimately drains into the Mississippi River. The plant plays a key role in protecting the ecological health of these waterways, supporting aquatic life and downstream communities.

The plant discharges into local streams that feed the Kickapoo River, part of the Upper Mississippi River Basin. This watershed supports diverse aquatic habitats and is important for migratory fish and waterfowl. The region's rural character means that maintaining water quality is critical for both ecological integrity and recreational uses like fishing and canoeing.