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Warren Lehrenbaum

Phone: +1 202.624.2755
1001 Pennsylvania Avenue NW
Washington, DC 20004-2595

Warren Lehrenbaum represents individual companies and trade associations before the U.S. Environmental Protection Agency (EPA), the United States Department of Agriculture (USDA) and the Food and Drug Administration (FDA), where he advocates on behalf of individual products as well as broad policy issues.

Warren serves as a member on the firm's Environment & Natural Resources Group Steering Committee. His practice focuses on chemical regulation and biotechnology issues arising under the Toxic Substances Control Act (TSCA), the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA), the Food Quality Protection Act (FQPA), the Federal Food, Drugs and Cosmetics Act (FFDCA), the Emergency Planning and Community Right-to-Know Act (EPCRA), and related State and Federal laws. He assists large and small companies in the chemical and biotechnology fields obtain regulatory approvals for their products, and he helps clients address ongoing compliance and product stewardship issues. Warren's counseling in these areas typically involves issues such as: assisting manufacturers of chemical or biotechnology products understand their registration, premarket notification, testing and reporting obligations, and assisting manufacturers of crop protection products in protecting their data compensation rights. He also assists companies in their day-to-day compliance with pollution control obligations under the Clean Water Act, the Resource Conservation and Recovery Act (RCRA) and other statutes.

A substantial portion of Warren's practice is devoted to helping clients develop and implement corporate compliance programs, including environmental auditing programs and comprehensive environmental management systems. He also assists clients in identifying instances of potential non-compliance and defending against administrative investigations and enforcement actions. Warren has negotiated successful settlements in numerous enforcement cases, often involving complex supplemental enforcement projects (SEPs) and challenging economic benefit and BEN model issues.


  • Binghamton University (State University of New York), B.A. (1985)
  • The George Washington University Law School, J.D. (1989) with honors


Admitted to practice: District of Columbia; Maryland 

Other Affiliations

American Bar Association; Environmental Law Institute

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"March 1, 2019!," Environment & Natural Resources Law Alert (February 7, 2019). Contacts: Warren Lehrenbaum, John D. Conner, Jr., Amy Symonds, Michael Boucher
Client Alert/Newsletter
"Processing Notices of Arrival During the 2018-2019 Government Shutdown," Environment & Natural Resources Law Alert (January 10, 2019). Contacts: Warren Lehrenbaum, John D. Conner, Jr., Amy Symonds, Michael Boucher
Client Alert/Newsletter
"Amended TSCA and Data Compensation," Pesticide Data Compensation and Protection in a Global Marketplace, Cary, NC (April 5, 2018). Presenter: Warren Lehrenbaum.
TSCA Rule Would Help Fund Broader EPA Chemical Program Law360 (February 9, 2018)
In the News
"Chemical Control Legislation in USA and Nanomaterials: State Focus, Including New California Safer Chemicals Requirements," ChemCon the Americas 2018: Seminar 4 - Chemical Control legislation in USA and Nanomaterials, New Orleans, LA (February 6, 2018). Panelist: Warren Lehrenbaum.
What Environmental Attorneys Are Watching Out of in 2018 Bloomberg BNA (December 27, 2017)
In the News
How The Trump Administration Is Putting Its Stamp On TSCA Law360 (November 9, 2017)
In the News
"The New TSCA – An Overview," 2017 American Fuel & Petrochemical Manufacturers (AFPM) Environmental Conference, Denver, CO (October 17, 2017). Presenters: Warren Lehrenbaum and Amy Symonds.
"Environmental Law and Practice in the United States: Overview," Practical Law (October 1, 2017). Authors: David Y. Chung, Warren U. Lehrenbaum, Thomas A. Lorenzen, Kirsten L. Nathanson and Jennifer A. Giblin.
"Final TSCA Inventory Reset Rule Now Effective; Clock is Ticking for Companies to Report," Environment & Natural Resources Law Alert (August 22, 2017). Contact: Warren Lehrenbaum
Client Alert/Newsletter

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Crowell & Moring LLP is an international law firm with more than 500 lawyers representing clients in litigation and arbitration, regulatory, and transactional matters. The firm is internationally recognized for its representation of Fortune 500 companies in high-stakes litigation, as well as its ongoing commitment to pro bono service and diversity. The firm has offices in Washington, DC, New York, Los Angeles, San Francisco, Orange County, London, and Brussels.

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