Lagrange County RUD Region B Wastewater Treatment Plant, Mount Pisgah, Indiana

Lagrange County RUD Region B is a municipal wastewater treatment plant located in Mount Pisgah, LaGrange County, Indiana. The facility serves a population of about 6,000 residents, placing it in the small-to-medium agglomeration category for US wastewater infrastructure. As a US-based plant, it operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Indiana Department of Environmental Management. For plants of this scale, secondary treatment is the standard requirement, ensuring removal of organic matter and suspended solids before discharge. The plant's treated effluent is discharged into local waterways that drain into the St. Joseph River watershed, which ultimately flows into Lake Michigan. This connection to the Great Lakes system underscores the importance of effective nutrient removal to protect downstream aquatic ecosystems and drinking water sources.

The plant discharges into the St. Joseph River watershed, which flows into Lake Michigan, part of the Great Lakes system. This region supports diverse aquatic life and provides drinking water for millions. Effective treatment is critical to prevent nutrient loading and harmful algal blooms in the lake.