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Peter Strassner


Washington, D.C.
314 552 6109 direct

Peter is a nationally recognized environmental attorney who helps companies respond to major environmental incidents, navigate regulatory actions, and successfully resolve civil and criminal litigation and other disputes. He is the co-chair of Thompson Coburn's environmental group.

Cited in Chambers USA as a "strong and savvy advocate for his clients," Peter draws on 30 years of environmental law experience to pursue unique and highly effective strategies that resolve environmental issues. He is one of the region's few environmental litigators who also has extensive experience in transactions. Peter has developed solutions for clients that have dramatically reduced cleanup costs or liability, resulted in successful "no action required" determinations, and allowed for the closure or sale of previously contaminated sites. Frequently Peter's contributions have enabled a company to favorably resolve expensive litigation or put an end to decades of costly and ineffective environmental cleanups.

With first-hand experience on many of the most significant environmental incidents to occur in the Midwest over the last three decades, Peter has been named multiple times as the "St. Louis Lawyer of the Year" for environmental law and litigation by Best Lawyers. He counsels some of the country's leading companies in environmental matters, and has represented and litigated successfully on behalf of transportation concerns, mining companies, agribusinesses, chemical and pharmaceutical manufacturers, developers, and energy companies.

Peter's broad national practice includes work on CERCLA cost recovery and contribution litigation, insurance coverage litigation, and a wide variety of regulatory and compliance matters. He has worked on issues related to wetlands, groundwater issues, Superfund sites, and brownfields.

In each matter and for each client, Peter applies dedication and creativity, and works to solve problems and craft solutions that align with his client's ultimate business objectives.

Thompson Coburn Publications

EPA Regional Counsel and MDNR General Counsel discuss environmental enforcement under new administrations

Do you need a Section 404 permit for your real estate development?

Chemical Safety Board investigator outlines discoveries from West Fertilizer, Charleston water incidents

Top Region 7 attorney details EPA’s biggest enforcement, compliance priorities


"Do you need a Section 404 permit for your real estate development?"
September 2016

"Cleaning the Carter Carburetor site to transform a neighborhood";
St. Louis Business Journal, August 2014

"Chemical Safety Board investigator outlines discoveries from West Fertilizer, Charleston water incidents";
July 2014

"Top Region 7 attorney details EPA’s biggest enforcement, compliance priorities";
June 2014

Co-Author, "Supreme Court Severely Limits Cost Recovery Options for Environmental Cleanups";
Midwest In-House, January 2005


17 Thompson Coburn attorneys recognized in 2019 Chambers USA

Peter Strassner talks to Best Lawyers about Thompson Coburn’s environmental practice

Thompson Coburn’s Environmental practice group celebrates top rankings

Congratulations to our 14 ‘Lawyers of the Year’ for 2019

U.S. News & World Report names Thompson Coburn as best for railroad law

23 Thompson Coburn attorneys recognized in 2016 Chambers USA

Cleaning up a toxic site for the Boys & Girls Club

25 Thompson Coburn attorneys recognized in 2015 Chambers USA

Congratulations to our 15 St. Louis ‘Lawyers of the Year’

St. Louis Business Journal covers Thompson Coburn’s work on unique Superfund settlement

Chemical Safety Board investigator shares insights from two high-profile environmental incidents

27 Thompson Coburn attorneys recognized in 2014 Chambers USA

EPA, Boys & Girls Club announce $30 million cleanup of Superfund site

More than 50 attorneys named to 2012 Missouri Bar Pro Bono Hall of Fame

Boys & Girls Clubs of Greater St. Louis honors Thompson Coburn for pro bono work on Superfund cleanup site

19 Thompson Coburn partners named 2013 St. Louis Lawyers of the Year

Thompson Coburn wins Illinois Supreme Court victory for ExxonMobil Coal

Peter Strassner named St. Louis Environmental Lawyer of the Year