Overview
PISGAH STL is a secondary wastewater treatment plant in Harrison County, Iowa, serving 268 people. It discharges 113.56 megaliters annually and has a design capacity of 189.27 megaliters.
PISGAH STL is a municipal wastewater treatment plant located in Harrison County, Iowa, United States. The facility serves a small population of 268 residents, reflecting its role in a rural community. As a secondary treatment plant, it provides biological treatment to remove organic matter and suspended solids before discharge. The plant has a design capacity of 189.27 megaliters and an annual discharge volume of 113.56 megaliters, indicating it operates below its designed capacity. Under the U.S. Clean Water Act, such facilities are regulated through National Pollutant Discharge Elimination System (NPDES) permits, which set effluent limits to protect water quality. The plant's secondary treatment level meets the minimum federal standard for municipal wastewater treatment. The treated effluent is discharged into a local water body, likely a stream or river within the Missouri River basin, as Harrison County lies in western Iowa near the Missouri River. The plant's operations contribute to protecting downstream aquatic ecosystems and public health in the region.
Environmental context
The plant discharges into a local watercourse that ultimately drains into the Missouri River, a major tributary of the Mississippi River. The Missouri River supports diverse aquatic life and provides habitat for fish species such as channel catfish and paddlefish. The plant's secondary treatment helps reduce nutrient and organic pollution, safeguarding water quality in this agriculturally intensive region.
Frequently asked questions
PISGAH STL is located on Jackson Street in Harrison County, Iowa, United States, near the town of Pisgah.
The plant serves a population of 268 people, typical of a small rural community in western Iowa.
The plant discharges treated effluent into a local water body that flows into the Missouri River basin. The plant's secondary treatment ensures compliance with Clean Water Act standards.
As a U.S. facility, PISGAH STL operates under the Clean Water Act and is regulated through an NPDES permit issued by the Iowa Department of Natural Resources or the EPA. The permit sets effluent limits for pollutants to protect water quality.
For small populations under 500, secondary treatment is standard, involving biological processes like activated sludge or trickling filters. The U.S. Clean Water Act requires secondary treatment for all municipal plants, with some exceptions for very small systems.
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