Aaron Farmer

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Aaron Farmer

Assistant Section Chief
Environmental Enforcement Section

Office: 614-466-2766
Direct: 614-728-3083
Fax: 614-644-1926
Aaron joined the Ohio Attorney General’s Environmental Enforcement Section in 2008. He has served as Assistant Section Chief since 2021. In this position, he assists the Chief in leading the Section and overseeing criminal prosecutions, civil enforcement actions and administrative appeals. Aaron also has supervised the attorneys and caseload in the Section’s Air Unit and participated in the litigation of numerous environmental enforcement actions and administrative cases for various units of the Environmental Enforcement Section in state and federal courts. He served as Ohio’s lead environmental attorney on the Volkswagen diesel-engine matter, facilitating the allocation of Ohio EPA’s share of a $2.9-billion federal trust for diesel-pollution-reduction projects in Ohio. As lead attorney, he also convinced an Ohio appellate court to reject Volkswagen’s challenge and preserve Ohio’s authority to seek penalties against the car manufacturer. After the Supreme Court of Ohio agreed with the lower court and the Supreme Court of the United States passed on Volkswagen’s appeal, Volkswagen settled with Ohio for $3.5 million. Aaron assisted in the $1.71-million settlement with Sunny Farms Landfill that resolved alleged violations of past water pollution, solid waste and air pollution laws. He also served as Ohio’s lead appellate attorney in an asbestos enforcement case, where the court affirmed an $850,000 civil penalty against a demolition company and its owner for their violations. 
Aaron also works on comments and appeals of rulemakings promulgated by the United States Environmental Protection Agency. In addition, Aaron participates in the Ohio Attorney General’s Major Appeals Group, assisting the Office of the State Solicitor General in brief writing and oral argument preparation for cases significant to the State of Ohio.
Before joining the Ohio Attorney General’s Environmental Enforcement Section, Aaron was an Assistant Prosecuting Attorney for the Clinton County Prosecutor’s Office. He managed the juvenile-delinquency docket and prosecuted felony cases, juvenile delinquencies and child support cases.


  • Ohio
  • Tennessee
  • U.S. District Court, Southern District of Ohio
  • U.S. District Court, Northern District of Ohio
  • U.S. Court of Appeals for the Sixth Circuit
  • U.S. Court of Appeals for the D.C. Circuit
  • The Ohio State University, Moritz College of Law, J.D. 2005
  • Miami University, B.S. (Business) 2002
  • Co-Chair of Planning Committee, Environmental Law Committee, Ohio State Bar Association (September 2012 through April 2013)
  • Co-Chair of Environmental Law Committee, Columbus Bar Association (September 2011 through May 2013)
  • Issues Concerning Water Pollution Prevention and Enforcement: Minimizing Water Pollution from Manure Sources in Ohio
    • Columbus Bar Association, Columbus, Ohio 2011
  • Rulemaking after Michigan v. EPA:  When EPA Must, May, Must Not Consider Costs
    • Ohio State Bar Association, Columbus, Ohio 2015
  • The Personal Participation Theory – Ohio’s Direct Liability Alternative to Corporate Veil Piercing in Environmental Enforcement Cases
    • Regional Environmental Enforcement Associations, Salt Lake City, Utah 2016
  • Volkswagen Diesel Fraud: Injunctions in Federal Court Drive Pollution Reductions in Ohio
    • Ohio State Bar Association, Columbus, Ohio 2017
  • 2018 Environment, Energy, and Resources Case Law Update
    • Ohio State Bar Association: Columbus, Ohio 2018
  • Ohio Pipeline Litigation: Is the 6th Circuit the New ERAC?
    • Ohio State Bar Association: Columbus, Ohio 2019
  • Climate Change: Methane Regulation and Industries’ Response to Disasters
    • Ohio State Bar Association: Columbus, Ohio 2020 (remote presentation)
  • Volkswagen: The Diesel Fraud, the Diesel Projects, and the States’ Enforcement
    • Ohio State Bar Association: Columbus, Ohio 2022 (remote presentation)