The document discusses the Susquehanna River Basin, which is the second largest river basin east of the Mississippi River. It drains parts of New York, Pennsylvania, and Maryland over 444 miles before emptying into the Chesapeake Bay. Major water quality concerns in the basin include agricultural runoff, wastewater from the Binghamton area, septic systems in unsewered areas, and flooding impacts. The document also provides details about upgrades to the 26th Ward Water Pollution Control Plant in New York City, including its design capacity, population served, and receiving water body.