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Warren Lehrenbaum

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Areas of Focus

Overview

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 and 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.

Career & Education

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

    • District of Columbia
    • Maryland
    • District of Columbia
    • Maryland

  • Other Affiliations

    American Bar Association; Environmental Law Institute

    Other Affiliations

    American Bar Association; Environmental Law Institute

    • Farsi
    • Farsi

Warren's Insights

Client Alert | 3 min read | 05.16.25

EPA Maintains Current Drinking Water Standards for PFOA and PFOS but Plans To Reconsider Other PFAS Compounds

On May 14, 2025, the Environmental Protection Agency (“EPA”) announced that it will keep the current National Primary Drinking Water Regulations (“NPDWR”) for perfluorooctanoic acid (“PFOA”) and perfluorooctane sulfonic acid (“PFOS”) under the Safe Drinking Water Act (“SDWA”), while extending the compliance deadline from 2029 to 2031. EPA further announced it plans to rescind requirements in those regulations applicable to other PFAS and mixtures of certain PFAS in drinking water. The NPDWR consists of legally enforceable primary standards and treatment techniques that apply to public water systems and guide EPA’s enforcement of the SDWA. This announcement follows EPA’s April 28, 2025 press release outlining its priorities for PFAS enforcement, which included 21 actions EPA intends to take to address PFAS and “engage with Congress and industry to establish a clear liability framework that ensures the polluter pays and passive receivers are protected.”...

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Insights

Client Alert | 3 min read | 05.16.25

EPA Maintains Current Drinking Water Standards for PFOA and PFOS but Plans To Reconsider Other PFAS Compounds

Blog Post | 05.16.25

Federal PFAS Reporting Delayed, but Aerospace and Car-Part Companies are not Off-the-Hook

Client Alert | 3 min read | 05.15.25

EPA Pushes PFAS Reporting to April 2026—What Companies Need To Know

Speaking Engagement | 04.15.25

"A Deep Dive into Critical Use Exemptions and Alternatives under TSCA Section 6g," Global Chemical Regulations Conference

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Practices

Industries

Warren's Insights

Client Alert | 3 min read | 05.16.25

EPA Maintains Current Drinking Water Standards for PFOA and PFOS but Plans To Reconsider Other PFAS Compounds

On May 14, 2025, the Environmental Protection Agency (“EPA”) announced that it will keep the current National Primary Drinking Water Regulations (“NPDWR”) for perfluorooctanoic acid (“PFOA”) and perfluorooctane sulfonic acid (“PFOS”) under the Safe Drinking Water Act (“SDWA”), while extending the compliance deadline from 2029 to 2031. EPA further announced it plans to rescind requirements in those regulations applicable to other PFAS and mixtures of certain PFAS in drinking water. The NPDWR consists of legally enforceable primary standards and treatment techniques that apply to public water systems and guide EPA’s enforcement of the SDWA. This announcement follows EPA’s April 28, 2025 press release outlining its priorities for PFAS enforcement, which included 21 actions EPA intends to take to address PFAS and “engage with Congress and industry to establish a clear liability framework that ensures the polluter pays and passive receivers are protected.”...

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