Marshall Street AWTTP | Clearwater, Florida Wastewater Treatment Plant

Marshall Street AWTTP is a municipal wastewater treatment facility located in Clearwater, Florida, United States. The plant serves a population of approximately 50,000 people, placing it in the medium-agglomeration category under US regulatory frameworks. It operates within Pinellas County, a densely populated coastal area on the Gulf of Mexico. As a US facility, Marshall Street AWTTP operates under the Clean Water Act, administered by the EPA and the Florida Department of Environmental Protection. Plants of this scale typically require secondary treatment as a minimum, with additional nutrient removal standards applicable in the Tampa Bay watershed to address eutrophication concerns. The designed capacity is 1.00 million gallons per day, indicating a facility sized for the community's needs. The plant's treated effluent is discharged into the Tampa Bay estuary, a major ecological resource that supports diverse marine life, including seagrass beds, mangroves, and fisheries. The bay ultimately connects to the Gulf of Mexico, making the plant's nutrient management critical for downstream water quality and coastal ecosystem health.

Marshall Street AWTTP discharges into the Tampa Bay watershed, which drains into the Gulf of Mexico. Tampa Bay is a large estuary that supports seagrass meadows, mangrove forests, and diverse aquatic species, including manatees and sea turtles. The region is ecologically sensitive due to nutrient loading from urban runoff and wastewater, requiring advanced treatment to prevent algal blooms and hypoxia. The plant's location within 50 km of the coast underscores its role in protecting coastal water quality.