Easton began construction on its first sewage system in 1911. In operation by 1914, it was the first separate storm and sanitary wastewater system in the State of Maryland. Currently, the Wastewater Department serves about 6,000 customers through over 84 miles of wastewater mains, six major pumping stations and an environmentally-friendly wastewater treatment facility.

The wastewater treatment facility, one of Maryland's most environmentally friendly, is anticipated to meet Easton's wastewater needs to 2030 while exceeding Chesapeake Bay water quality goals for reducing nitrogen and phosphorus. The process is designed to reduce effluent concentrations of nitrogen to 3 milligrams per liter (mg/l) and phosphorus to 0.3 mg/l-a decrease of 83 percent (182,000 pound) and 81 percent (16,000 pound) respectively. The new facility began operation in 2007.