[1] GE acquired the facilities of the Stanley Electric Manufacturing Company in 1903.

[2] From circa 1932 until 1977, the Pittsfield Plant discharged PCB pollution to the Housatonic River.

The U.S. Environmental Protection Agency (EPA) designated the Pittsfield plant and several miles of the Housatonic as a Superfund site in 1997, and ordered GE to remediate the site.

GE transferred some of the cleaned-up properties to the Pittsfield Economic Development Authority (PEDA).

As of 2022 GE has completed remediation and restoration of the 10 manufacturing plant areas within the city, and GE and PEDA are conducting inspection, monitoring and maintenance activities.