Overview
Grayling STP serves 1,952 residents in Grayling Charter Township, Michigan. The plant operates under the US Clean Water Act framework for small municipal wastewater systems.
Grayling STP is a municipal wastewater treatment plant located in Grayling Charter Township, Crawford County, Michigan. The facility serves a population of approximately 1,952 people, classifying it as a small-scale treatment system within the state's wastewater infrastructure. As a US-based plant, Grayling STP operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permits issued by the Michigan Department of Environment, Great Lakes, and Energy (EGLE). For small agglomerations like this, secondary treatment is typically required to meet effluent standards for biochemical oxygen demand and total suspended solids. The plant's treated effluent likely discharges to a local waterway within the Au Sable River basin, which flows into Lake Huron. The Au Sable River is a renowned coldwater fishery supporting trout populations and is ecologically sensitive to nutrient loading and temperature changes.
Environmental context
The plant's discharge likely enters a tributary of the Au Sable River, which flows eastward into Lake Huron. The Au Sable River is a high-quality coldwater stream that supports diverse aquatic life, including brook trout and brown trout. Protecting water quality in this watershed is critical for maintaining the river's ecological integrity and recreational value.
Frequently asked questions
Grayling STP is located on Waste Water Trail in Grayling Charter Township, Crawford County, Michigan, United States.
Grayling STP serves a population of approximately 1,952 people.
The plant likely discharges into a tributary of the Au Sable River, which flows into Lake Huron.
As a US municipal wastewater plant, Grayling STP operates under the Clean Water Act and requires an NPDES permit from Michigan EGLE. Small plants like this typically need secondary treatment to meet effluent limits.
For small US plants serving around 2,000 people, secondary treatment is standard. This usually involves biological processes like activated sludge or lagoon systems to reduce organic pollutants.
Nearby plants