Overview
Caledonia STP serves Mayville Township, Minnesota, treating wastewater for approximately 2,849 residents. The plant operates under the US Clean Water Act framework, discharging into local waterways.
Caledonia STP is a municipal wastewater treatment plant located in Mayville Township, Houston County, Minnesota. It serves a population of about 2,849 people, classifying it as a small community facility under US EPA guidelines. As a US-based plant, Caledonia STP operates under the Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges. For small agglomerations like this, secondary treatment is typically mandated to meet water quality standards. The plant discharges into local waterways that drain into the Mississippi River basin, ultimately reaching the Gulf of Mexico. Its operations contribute to protecting downstream aquatic ecosystems and maintaining water quality in the region.
Environmental context
The plant's discharge flows into tributaries of the Mississippi River, which carries water south to the Gulf of Mexico. This watershed supports diverse aquatic life and is part of a major migratory corridor for birds and fish. The plant's treatment helps reduce nutrient loading that could contribute to hypoxia in the Gulf.
Frequently asked questions
Caledonia STP is located on County Road 249 in Mayville Township, Houston County, Minnesota, United States.
The plant serves approximately 2,849 residents in the Mayville Township area.
The plant discharges treated effluent into local waterways that are part of the Mississippi River basin, ultimately flowing to the Gulf of Mexico.
As a US facility, Caledonia STP operates under the Clean Water Act and must comply with an NPDES permit issued by the Minnesota Pollution Control Agency or EPA.
For small communities of this size, secondary treatment is standard under the Clean Water Act, often using activated sludge or lagoon systems to meet effluent limits.
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