Church Hill STP - Secondary Wastewater Treatment Plant in Church Hill, Maryland

Church Hill STP is a municipal wastewater treatment plant located in Church Hill, Queen Anne's County, Maryland, United States. The facility serves a small population of approximately 600 residents, providing secondary treatment to meet state and federal water quality standards. The plant operates under the regulatory framework of the U.S. Clean Water Act, which requires secondary treatment for municipal wastewater. With a designed capacity of 302.83 million gallons per year and an actual discharge volume of 128.70 million gallons per year, the plant operates well below its capacity, indicating room for future growth or seasonal variability. The treated effluent is discharged into local waterways that ultimately drain into the Chesapeake Bay, the largest estuary in the United States. The Chesapeake Bay watershed is ecologically sensitive, supporting diverse aquatic life and important fisheries. The plant's secondary treatment helps reduce nutrient and pollutant loads to the bay, contributing to regional restoration efforts.

The plant discharges into tributaries of the Chester River, which flows into the Chesapeake Bay. The Chesapeake Bay is a vital estuary that supports blue crabs, oysters, and migratory fish. Nutrient pollution from wastewater is a key concern, and secondary treatment helps mitigate nitrogen and phosphorus loads that can cause algal blooms and hypoxia in the bay.