Muir Lyons STP - Secondary Wastewater Treatment in Lyons Township, Michigan

Muir Lyons STP is a municipal wastewater treatment facility located in Lyons Township, Ionia County, Michigan. The plant serves a small community of about 1,348 people, providing essential wastewater treatment for the rural area. It operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal discharges. The plant employs secondary treatment processes to reduce organic pollutants and suspended solids before discharge. With a designed capacity of 946.35 cubic meters per day and an average discharge volume of 529.96 cubic meters per day, the facility operates at approximately 56% capacity, indicating room for future growth. As a US facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. The treated effluent from Muir Lyons STP is discharged into a local water body that ultimately drains into the Grand River watershed and then to Lake Michigan. This connection to the Great Lakes system underscores the plant's role in protecting downstream aquatic ecosystems and drinking water sources. The facility's inland location reduces direct marine impact, but its discharge contributes to the overall health of the regional watershed.

The plant discharges into a local water body within the Grand River basin, which flows into Lake Michigan, part of the Great Lakes system. This watershed supports diverse aquatic life, including fish species such as walleye and salmon, and provides drinking water for millions. The secondary treatment helps reduce nutrient loading, which is critical to prevent algal blooms in the Great Lakes.