Donaldsonville STP - Municipal Wastewater Treatment in Ascension Parish, Louisiana

Donaldsonville STP is a municipal wastewater treatment plant located in Ascension Parish, Louisiana, serving a population of about 7,949. The plant is situated near the Mississippi River, a major waterway that flows into the Gulf of Mexico. As a facility in the United States, it operates under the Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for discharges into surface waters. For a plant serving a population of this size, secondary treatment is typically required under federal regulations. It is expected to meet state and federal effluent guidelines. The plant's location in a low-lying, humid subtropical climate influences operational considerations such as stormwater management and seasonal flow variations. The treated effluent from Donaldsonville STP likely discharges into a tributary of the Mississippi River, which ultimately drains into the Gulf of Mexico. This water body supports diverse aquatic life and is an important ecological and economic resource for the region. The plant's operations contribute to protecting water quality in the Mississippi River basin and downstream coastal environments.

The plant's receiving water body is likely a tributary of the Mississippi River, which flows into the Gulf of Mexico. The Mississippi River basin is a major ecological corridor supporting diverse fish, bird, and plant species. Downstream, the Gulf of Mexico is a productive marine ecosystem, but it faces challenges such as nutrient pollution and hypoxia. The plant's discharge must comply with NPDES limits to minimize impacts on these sensitive waters.