Blackwater WWTP, Baldwin County, Alabama: Secondary Treatment Plant Serving 9,850 Residents

Blackwater WWTP is a municipal wastewater treatment facility located in Baldwin County, Alabama, United States. It serves a population of approximately 9,850 residents, placing it in the small-to-medium agglomeration category. The plant is situated near the Gulf of Mexico, within 10 km of the coast, and its operations are subject to the U.S. Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting. The facility provides secondary treatment, which is the minimum standard required by the Clean Water Act for municipal wastewater plants. With a designed capacity of 76,086.54 million gallons per day and an actual discharge volume of 3.79 million gallons per day, the plant operates well below its capacity. Secondary treatment typically involves biological processes to reduce organic matter and suspended solids. The treated effluent is discharged into local waterways that ultimately drain into the Gulf of Mexico. The coastal location means the plant's discharge can affect sensitive marine ecosystems, including estuaries and nearshore habitats. Proper treatment is essential to protect water quality in the region, which supports diverse aquatic life and recreational activities.

The plant's discharge flows into the coastal watershed of Baldwin County, which drains into the Gulf of Mexico via the Perdido Bay or Mobile Bay systems. This region supports ecologically sensitive estuarine habitats, including seagrass beds and oyster reefs, which are vulnerable to nutrient pollution. The proximity to the coast (within 10 km) means treated effluent can quickly reach marine environments, emphasizing the need for effective nutrient removal.