HINTON WWTP - Plymouth County, Iowa Wastewater Treatment Plant

HINTON WWTP is a municipal wastewater treatment facility located in Plymouth County, Iowa, United States. The plant serves a small community of approximately 808 residents, reflecting its role in managing local domestic wastewater. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant operates under the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. The National Pollutant Discharge Elimination System (NPDES) permit program governs its discharge, ensuring compliance with water quality standards. With a designed capacity of 264.98 million gallons per year and an actual discharge volume of 359.61 million gallons per year, the plant manages flows that may exceed its design capacity, indicating potential operational challenges. The treated effluent is discharged into a local water body, likely a stream or river within the Missouri River basin. The plant's inland location, over 50 km from the coast, means its discharge affects freshwater ecosystems. The receiving waters support aquatic life and may be used for recreation or agriculture downstream, making proper treatment essential for environmental health.

The plant discharges into a water body within the Missouri River watershed, which flows into the Mississippi River and ultimately the Gulf of Mexico. This inland location means the effluent influences freshwater habitats, including streams and rivers that support fish, invertebrates, and riparian vegetation. The region's agricultural landscape may contribute nutrient runoff, and the plant's secondary treatment helps reduce organic loading, though nutrient removal is limited. Downstream ecosystems depend on maintaining water quality to prevent eutrophication and protect biodiversity.