Overview
Crystal Falls STP is a secondary treatment plant serving 1,791 people in Mastodon Township, Michigan. It discharges 870.65 thousand cubic meters of treated wastewater annually.
Crystal Falls STP is a municipal wastewater treatment facility located in Mastodon Township, Iron County, Michigan. The plant serves a small population of 1,791 residents, providing secondary treatment to meet state and federal water quality standards. The plant has a designed capacity of 1,135.62 thousand cubic meters and treats an average annual discharge volume of 870.65 thousand cubic meters. As a secondary treatment facility, it operates under the U.S. Clean Water Act, which requires such plants to meet effluent limitations for biochemical oxygen demand and total suspended solids. The treated effluent is discharged into local waterways within the Lake Michigan basin. The plant plays a key role in protecting downstream aquatic ecosystems and ensuring the health of the Great Lakes watershed.
Environmental context
The plant discharges into receiving waters that ultimately flow into Lake Michigan, part of the Great Lakes system. The Great Lakes hold 20% of the world's surface freshwater and support diverse fish populations, including lake trout and whitefish. Protecting water quality in this basin is critical for drinking water, recreation, and ecological balance.
Frequently asked questions
Crystal Falls STP is located in Mastodon Township, Iron County, Michigan, United States.
The plant serves a population of 1,791 people.
The plant provides secondary treatment, which typically includes biological processes to reduce organic matter and suspended solids.
Under the Clean Water Act, secondary treatment plants like Crystal Falls STP must meet National Pollutant Discharge Elimination System (NPDES) permit requirements, including effluent limits for BOD and TSS.
The plant discharges an average of 870.65 thousand cubic meters of treated wastewater annually.
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