Overview
Sioux City WWTP serves approximately 98,485 people in Sioux City, Iowa. The plant discharges into the Missouri River under the US Clean Water Act regulatory framework.
Sioux City WWTP is a municipal wastewater treatment facility serving Sioux City, Iowa, a community of about 98,485 residents in Woodbury County. The plant is situated near the Missouri River, which forms the western border of the city and is a major tributary of the Mississippi River. As a facility serving a population of nearly 100,000, Sioux City WWTP is classified as a large agglomeration under US EPA guidelines. Such plants are typically required to provide at least secondary treatment under the Clean Water Act National Pollutant Discharge Elimination System (NPDES) permit program. The plant's treatment processes and capacity are designed to meet state and federal effluent limits for the protection of the Missouri River. The plant's treated effluent is discharged into the Missouri River, which flows southward to join the Mississippi River near St. Louis, Missouri. The Missouri River supports diverse aquatic life and is an important migratory corridor for fish and birds. The plant's operations are critical to maintaining water quality in this major river system, which ultimately drains into the Gulf of Mexico.
Environmental context
Sioux City WWTP discharges into the Missouri River, a major tributary of the Mississippi River that drains into the Gulf of Mexico. The Missouri River in this reach supports diverse aquatic species and is part of a larger river ecosystem that provides habitat for fish, birds, and other wildlife. The plant's effluent must comply with water quality standards to protect downstream uses, including recreation and aquatic life.
Frequently asked questions
Sioux City WWTP is located in Sioux City, Woodbury County, Iowa, United States, near the Missouri River.
The plant serves approximately 98,485 people in the Sioux City area.
The plant discharges treated effluent into the Missouri River, which flows into the Mississippi River and ultimately the Gulf of Mexico.
The plant operates under the US Clean Water Act, which requires NPDES permits for wastewater discharges. Facilities of this scale typically require at least secondary treatment to meet water quality standards.
Plants serving around 100,000 people in the US are classified as large facilities and are generally required to provide secondary treatment, which includes biological processes to remove organic matter and suspended solids. Many also incorporate nutrient removal to protect sensitive water bodies.
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