Cozen O’Connor: Environmental Litigation & Enforcement

Environmental Litigation & Enforcement

Recent News:

Nine Cozen O’Connor Attorneys Recognized as 2020 Southern California Super Lawyers

Super Lawyers has named nine Cozen O'Connor attorneys to its 2020 Southern California Super Lawyers.


Cozen O’Connor is a renown trial firm with decades of experience in environmental litigation and enforcement. We handle complex disputes and successfully litigate industry-defining cases. Whether defending a novel permit, responding to a government investigation, or seeking a high-value recovery, Cozen O’Connor is efficient, responsive, strategic, and tenacious.

The team has deep collective governmental experience that it leverages in every engagement. Our roster boasts several former senior enforcement attorneys with the U.S. Environmental Protection Agency (EPA), including the  former Regional Counsel for the Mid-Atlantic Region, and is chaired by the former Special Assistant to the EPA’s Director of Civil Enforcement. Having worked on both sides of the table, Cozen O’Connor attorneys understand agency processes, constraints, and priorities.

Cozen O’Connor’s Environmental Litigation team represents clients in matters concerning all major federal and state environmental laws: Clean Air Act, Clean Water Act, CERCLA and SARA, Endangered Species Act, Resource Conservation and Recovery Act (RCRA), Toxic Substances Control Act, and the Safe Drinking Water Act, among others.

Administrative Litigation

Attorneys litigate state and federal permit appeals, agency enforcement actions, and administrative rule challenges before the EPA, state environmental protection agencies, environmental hearing boards, and in other sophisticated administrative forums.

Civil Enforcement Defense

Cozen O’Connor guides client through government investigations, conducts internal investigations, and performs comprehensive audits, all with an eye toward achieving compliance and limiting exposure. Our experienced trial lawyers also defend clients in high-stakes state and federal civil actions with potential liability in the millions of dollars.

Private Party & Citizen Suit Litigation

The firm represents plaintiffs and defendants in cost recovery actions and in personal injury and property damage claims. We also handle the increasing amount of litigation brought by citizens or environmental advocacy groups seeking damages and injunctive relief for alleged environmental violations that regulators failed to enforce.

Appellate Litigation

Our team has extensive appellate capabilities and is often engaged to respond to lower court decisions in environmental litigation. Our attorneys are also adept at Natural Gas Act litigation in which the Federal Circuit Court of Appeals typically has original jurisdiction.


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).

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

In The News

Nine Cozen O’Connor Attorneys Recognized as 2020 Southern California Super Lawyers

January 15, 2020

Super Lawyers has named nine Cozen O'Connor attorneys to its 2020 Southern California Super Lawyers.

138 Cozen O’Connor Attorneys Named to the Best Lawyers in America

August 28, 2019

Best Lawyers selected 138 Cozen O’Connor lawyers from 21 of the firm’s national offices for inclusion in the 2020 edition of The Best Lawyers in America.