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WPSC Green Bay MGP Site

Site Information
Contact Information

Community Involvement Coordinator
Susan Pastor (pastor.susan@epa.gov)
312-353-1325 or 800-621-8431, ext. 31325

Remedial Project Manager
Margaret Gielniewski
312-886-6244 or 800-621-8431, ext. 66244


(where to view written records)

Brown County Library
515 Pine St.
Green Bay, WI

Links for Wisconsin former MGPs

Other useful links about MGPs

EPA Superfund Home Page
Region 5 Superfund

Agency for Toxic Substances & Disease Registry


The 14-acre Wisconsin Public Service Corp. site is located in Green Bay, Wis. Currently, the site is used as WPSC corporate offices and as an employee parking lot. It is on the south bank of the East River near the confluence of the Fox River.

WPSC owned and operated the gas plant from the 1871 to 1947 in an area that was historically industrial. Processes included coal carbonization and carbureted water gas. WPSC still owns the site today, except for a small portion owned by a nearby hotel.

A Community Advisory Group (CAG) is one way the community can get involved. Learn more about CAGs

Site Updates || Technical Documents || Legal Agreements

You will need the free Adobe Reader to view some of the files on this page. See EPA's PDF page to learn more.

Site Updates

April 2015

Contractors for site owner Integrys will be sampling for polycyclic aromatic hydrocarbons, or PAHs, along the Lower Fox River near the WPSC corporate office building this summer. This will involve using a machine that pulls up a “core” of soil and groundwater samples from existing monitoring wells.  In addition, some new, temporary monitoring wells will be installed and vapors near corporate buildings will be sampled through small holes drilled in the ground up to 10 feet deep.  Sediment and surface-water samples from various locations on the river were collected in August 2014. 

WPSC corporate employees, other nearby workers, and river trail users may notice increased traffic and two or three contractors taking samples using some light equipment such as a drill, as well as vapor sampling equipment about the size of a football.  EPA and Integrys will use the information collected to develop a document called a remedial investigation report, expected in 2017, which will describe PAH contamination in the area if any is found. 

Under Wisconsin Department of Natural Resources oversight, various investigations have taken place since the 1984. In 2003, a cleanup occurred which included excavation, thermal treatment, and removal of about 26,000 tons of highly contaminated soil. Routine groundwater monitoring occurs semi-annually. Annual inspection of the cleaned-up area (the parking lot) shows that the site remains safe for employees and visitors to the WPSC office building.

Plans for investigation of sediment, groundwater and soil at six MGP sites began after a legal agreement, called a consent order, was signed between WPSC and EPA in May 2006. This agreement allows for further investigation of the Green Bay site and will determine how much contamination remains there. The agreement also includes five other MGP sites in Stevens Point, Manitowoc, Marinette, Oshkosh, and Two Rivers, Wisconsin. A separate agreement for another site, WPSC Campmarina MGP in Sheboygan, was signed between WPSC and EPA in January 2007.

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Technical Documents

Manufactured Gas Plants (MGPs)

Learn about MGPs

EPA Region 5 is working on former MGPs in Wisconsin and Illinois.

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Legal Agreements

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