Superfund Site Profile

The 56-acre Watson Johnson Landfill site is located in Richland Township, Pennsylvania. A 32-acre landfill accepted industrial and municipal wastes on part of the site from the late 1950s until the early 1970s. Waste disposal activities contaminated soil, sediment and groundwater. The EPA added this site to the National Priorities List on September 13, 2001. The agency has conducted a comprehensive site study, known as the Remedial Investigation/Feasibility Study. Data from this investigation was used to determine the nature and extent of the contamination and to develop cleanup plans. The Remedial Investigation Report was finalized in May 2006 and is part of the Administrative Record for the site. A Pilot Study of chemical oxidation of ground water contaminants was conducted with favorable results. A Proposed Plan was issued for the Site for public comment and a Public Meeting was held on September 25, 2008 to discuss EPA's proposal. The Record of Decision for the Site was signed on August 14, 2009. The Remedial Design was initiated in November 2009 and a pre-design investigation was conducted. The Remedial Design was completed in September 2011.

To learn more about this site and EPA's cleanup process, please see the Watson Johnson Landfill Superfund Site Record of Decision.


Post Card July 2016 (PDF)

Beginning on May 31, 2016, EPA's contractors plan to begin the access road construction for the in-situ treatment (groundwater) cleanup effort. You may see bulldozers and other trucks throughout this process. We plan to keep you posted by uploading images of the work being conducted and keeping you updated on our progress. If you have any questions or concerns, please do not hesitate to contact us!

EPA held a Public Information Session on April 14th, 2016 to discuss the start of the groundwater portion of the cleanup. The presentation can be found here.

The cleanup will include construction of a landfill cap and in-situ treatment of groundwater :

A multi-layer cap for the landfill

  • All waste located outside the landfill will be removed or put below the cap
  • The landfill will be vegetated, and landscaping will be designed around the Site
  • The cap will prevent exposure to all landfill contaminants
  • A drainage system for the landfill will be installed
  • To learn more about landfill caps, click here.

Groundwater cleanup

  • Installation of injection wells to treat the contamination
  • Installation of additional monitoring wells to monitor cleanup effectiveness
  • To learn more about in-situ treatment of groundwater, click here.


Human Exposure

Under Control
Contaminated Ground
Water Status
Under Control
Site-Wide Ready for
Anticipated Use?