The East End Treatment Plant is a water-treatment facility located in Portland, Maine, United States.

[1] In operation since 1979,[2][3][4] and run by Portland Water District,[5] the plant sits at the opposite (southern) end of Tukey's Bridge from the former B&M Baked Beans factory.

In addition to producing clean water,[6] which flows into nearby Casco Bay, the facility also created hundreds of tons of treated biosolids.

[2] In the summer of that year, over one million gallons of partially treated sewage was released into Casco Bay after a disinfection tank was not powered on after being cleaned.

[7] Another discharge occurred in July 2020, when nearly four million gallons of partially treated sewage was released into Casco Bay after a power failure at the plant.