East Hanover Twp Grantville STP - Secondary Wastewater Treatment in East Hanover Township, Pennsylvania

East Hanover Twp Grantville STP is a municipal wastewater treatment facility located on Dairy Lane in East Hanover Township, Dauphin County, Pennsylvania. The plant serves a population of 2,890 and operates under the regulatory framework of the US Clean Water Act, which requires secondary treatment for municipal facilities of this scale. The plant's discharge volume is 726.80 units per day against a designed capacity of 1,514.16 units. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant is situated inland, more than 50 km from the coast, and its treated effluent flows into local waterways that are part of the Susquehanna River basin. The Susquehanna River ultimately drains into the Chesapeake Bay, a large estuary on the Atlantic coast. The plant's operations contribute to protecting downstream water quality in the Chesapeake Bay watershed, which supports diverse aquatic life and is an important ecological and economic resource.

The plant discharges into local streams that feed into the Susquehanna River, which flows south through Pennsylvania and Maryland before emptying into the Chesapeake Bay. The Chesapeake Bay is the largest estuary in the United States and supports a rich ecosystem of fish, crabs, and waterfowl. Nutrient and pollutant loads from wastewater plants in the basin are managed under the Chesapeake Bay Total Maximum Daily Load (TMDL) program to reduce eutrophication and improve water quality.