The Pharmacia & Upjohn Company LLC Site

On April 16, 2003, Pfizer Inc acquired Pharmacia Corporation and assumed responsibility for the former Upjohn Company site in North Haven, Connecticut. Although Pfizer never operated on the property, Pfizer takes seriously its responsibility to both the government and the community to address the conditions at the site in order to protect human health and the environment.


The 78-acre property has a long history of industrial use. Prior owners of the property manufactured products used in dyes and pigments; photographic chemicals; sunscreen agents; additives for soaps, perfumes and cosmetics; agricultural herbicides; pharmaceuticals and photo-initiators. All manufacturing ceased at the site in 1993.

In 1989, the USEPA issued the Upjohn Company (Upjohn) a Resource Conservation and Recovery Act (RCRA) 3013 Administrative Order that required a RCRA Facility Investigation (RFI). The subsequent investigation found 28 areas of environmental concern. In 1994, Upjohn and USEPA entered into a RCRA 3008(h) Administrative Order to continue and enhance interim remedial measures, assess site risk, and evaluate remedial alternatives.

Interim Measures

In the ensuing years, a number of significant measures were taken to protect human health and the environment, including: installation of a highly sophisticated, state-of-the-art groundwater recovery and treatment system; decontamination and removal of above-ground structures; soil and sludge capping and maintenance of site security.

The Regulatory Process

Since acquiring the former Upjohn Company site through its acquisition of Pharmacia Corporation in 2003, Pfizer has worked diligently to complete the site investigation and risk assessments. Pfizer obtained USEPA approval of the final site investigation in 2007 and the ecological risk assessment in 2008. Approval of the human health risk assessment was received from CTDEP in 2008. With the site investigate phase complete, USEPA officially terminated the RCRA Section 3013 Order on June 9, 2009.

On September 19, 2008, Pfizer received authorization from the USEPA to proceed with the Corrective Measures Study (CMS) to evaluate different cleanup technologies for the property. USEPA and CTDEP released the public notice of the Proposed Remedy for the site on June 19, 2010 and a public meeting was held on August 4, 2010 to obtain input from the community.

The USEPA issued its Remedy Decision and Response to Comments document, dated September 10, 2010, approving the final remedy for the Site and allowing Pfizer to begin the engineering design process.

On March 31, 2011, USEPA and the Pharmacia & Upjohn Company LLC entered into an updated Administrative Order on Consent to facilitate site remediation and return the property to productive use. On September 30, 2019, USEPA deemed the Remedy Construction Complete.

With remediation construction activities complete, Pharmacia and Upjohn has fulfilled its obligations with the USEPA, with the exception of some administrative filings. A Stewardship Permit has been filed with the CTDEEP to address ongoing operations, maintenance and management activities at the site.