Marcia Mulkey

Of Counsel


(215) 665-2122

(215) 665-2013

Recent Publication:

Environmental Compliance During the COVID-19 Pandemic [Alert]

Pete Fontaine, Marcia Mulkey, and Amorie Hummel discuss how various state and federal orders are impacting the environmental industry.

Marcia works on a wide range of federal and governmental regulatory matters and environmental issues and related transactions. She delivers insightful and informed advice and services to the firm's clients across a broad range of legal matters. Her clients have included those with matters involving pesticide registration, Clean Air Act compliance, Superfund liability, hazardous waste permitting, chemical reporting, state environmental regulation, and related issues. She has published and spoken on emerging PFAS regulatory developments and is sought out for issues warranting engagement with the Environmental Protection Agency (EPA). Marcia has a special interest in environmental compliance and enforcement, chemical regulation, and matters connected to her recently concluded service with the EPA, where she long served as Regional Counsel for the Mid-Atlantic region along with positions as national director of the offices of pesticides programs, site remediation enforcement, and policy, economics, and innovation. She was recognized with the Distinguished Career Service Award, capping a career that included two Presidential Rank Awards.
Marcia is a graduate of Harvard Law School and the University of Georgia, where she was recently recognized with a Distinguished Alumnus Award. 



Cozen O’Connor Welcomes Former EPA Senior Counsel Marcia Mulkey to its Utility, Environmental & Energy Practice

December 03, 2018

Mulkey will provide guidance on federal environmental regulation, compliance, and enforcement.


Environmental Compliance During the COVID-19 Pandemic [Alert]

April 15, 2020

Pete Fontaine, Marcia Mulkey, and Amorie Hummel discuss how various state and federal orders are impacting the environmental industry.

PFAS in California — Impact of the 2020 Defense Authorization Act [Alert]

February 10, 2020

Peter Fontaine and Marcia Mulkey discuss California’s active involvement in the emerging PFAS challenges and how extensive reporting requirements will result in rapid expansion of information.

Congress Passes Federal PFAS Legislation in Defense Authorization Act [Alert]

December 19, 2019

Pete Fontaine and Marcia Mulkey discuss the 2020 Defense Authorization Act, which will speed investigations and cleanups of military facilities contaminated with per- and poly-fluorinated compounds.

EPA Issues New CERCLA Guidance on Liability Protections for Current/Potential Impacted Site Owners [Alert]

September 09, 2019

If you’re back to work navigating the complexities of cleaning up a brownfields site, you’re in luck. The EPA issued an update to “Enforcement Discretion Guidance” for enforcement personnel as it relates to liability protections under the 2002 Brownfields Amendments to the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA).

States Ratcheting Down on PFAS Compounds, Moving Ahead of Federal Government [Alert]

July 31, 2019

Marcia Mulkey and Peter J. Fontaine discuss New Hampshire's drinking water maximum contaminant levels (MCLs) for PFOS and PFOA, which will go into effect October 1, 2019.

PFAS and Public Water Supply in Pennsylvania: Challenges & Opportunities [Alert]

May 20, 2019

Peter Fontaine, Michael Klein, and Marcia Mulkey discuss the Pennsylvania Department of Environmental Protection's tracking approximately 19 sites with known contamination with PFOA and PFOS and its PFAS sampling plan, targeting 300 public water supplies with elevated potential for contamination and testing for six PFAS compounds

Events & Seminars

Past Events


  • Harvard Law School, J.D., cum laude, 1976
  • University of Georgia, M.A.
  • University of Georgia, B.A.
  • District of Columbia
  • Pennsylvania