Overview
Marshalltown WWTP serves approximately 26,000 residents in Marshalltown, Iowa, as part of the city's municipal wastewater infrastructure. The plant discharges treated effluent into local waterways within the Iowa River basin.
Marshalltown WWTP is a municipal wastewater treatment facility located at 1003 Woodland Street in Marshalltown, Iowa. Serving a population of about 26,000, the plant is a key component of the city's public sanitation system, managing wastewater from residential, commercial, and industrial sources in the Marshall County area. As a facility in the United States, the plant operates under the Clean Water Act and is subject to National Pollutant Discharge Elimination System (NPDES) permitting requirements. For a community of this size, secondary treatment is typically mandated, with potential additional nutrient removal standards depending on the receiving water body's sensitivity. The plant's design and operation align with state and federal regulations to protect water quality. The treated effluent from Marshalltown WWTP ultimately drains into the Iowa River, which flows southeast to join the Mississippi River. This watershed supports diverse aquatic life and provides water for downstream communities. The plant's discharge is regulated to minimize environmental impact, particularly concerning nutrient loading that could affect the Mississippi River and the Gulf of Mexico's hypoxic zone.
Environmental context
The plant's discharge enters the Iowa River, a tributary of the Mississippi River, which flows into the Gulf of Mexico. This watershed is part of the larger Mississippi River basin, which supports extensive aquatic ecosystems and is a critical migratory corridor for fish and birds. Nutrient management is particularly important here due to the downstream contribution to the Gulf of Mexico's seasonal hypoxic zone, making effective treatment essential for regional water quality.
Frequently asked questions
Marshalltown WWTP is located at 1003 Woodland Street in Marshalltown, Iowa, United States.
The plant serves approximately 26,009 residents in the Marshalltown area.
The treated effluent is discharged into the Iowa River, which flows into the Mississippi River and eventually reaches the Gulf of Mexico.
As a U.S. facility, it operates under the Clean Water Act and is regulated via an NPDES permit issued by the Iowa Department of Natural Resources, ensuring compliance with federal water quality standards.
For a community of this size, secondary treatment is standard, often including biological processes to remove organic matter and suspended solids. Additional nutrient removal may be required to protect sensitive water bodies.
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