Photo of William D. Hayes

Areas of Focus

The Basics


Vermont Law School, L.L.M, Environmental Law, 2012

Capital University Law School, J.D., 1986

Denison University, B.A., 1983

Bar Memberships

  • Ohio State Bar Association
  • Cincinnati Bar Association
  • American Bar Association

Select Awards and Recognition

  • Cincy Leading Lawyers/Cincinnati Magazine, 2006-2017
  • The Best Lawyers in America®, Environmental Law, 2003-2017
  • The Best Lawyers in America® Cincinnati Environmental Lawyer of the Year, 2012, 2016

William D. Hayes

T 513.651.6827
F 513.651.6981
3300 Great American Tower
301 East Fourth Street
Cincinnati, OH 45202

About William

For the past 26 years Bill has served as environmental counsel for a foreign automotive manufacturer providing counsel on a broad range of local, state and federal environmental issues including new Greenfield facility sites and permitting, existing plant expansions, processing changes, and enforcement defense. Bill also advises clients on climate change regulatory developments. Bill’s practice covers all environmental media, but he has particularly extensive experience with all aspects of the Clean Air Act impacting the automotive manufacturing and parts industries, including major and minor New Sources Review, New Source Performance Standards, Maximum Achievable Control Technology requirements, and Title V Operating permits. Bill has unique experience and insight with regards to compliance counseling to the automotive manufacturing and parts industries having served in an in-house role. Prior to private practice, Bill managed the Ohio EPA attorneys assigned to the air and water programs and was extensively involved in rulemaking and enforcement under the Clean Air Act and Resource Conservation and Recovery Act.

Experience Highlights

  • Advised an automotive client on permitting aspects for new low volume hybrid supercar manufacturing facility utilizing non-traditional manufacturing technologies. In addition to permitting aspects, the project required negotiating state implementation plans revisions to address differences in rules designed for high volume coating technologies.
  • Represented automotive manufacturer in appeal of state regulatory agency’s effort to mandate permitting for full-vehicle dynamometer operations as stationary sources. Favorable decision resulted in revision of Ohio rules and exemption of full vehicle dynamometers at automotive manufacturing facilities from stationary source permitting.
  • Development of Ohio’s first Clean Air Act Plant-Wide Applicability Limit (PAL) permit allowing for increased flexibility for an automotive manufacturer to rapidly respond to changing market conditions without burdensome permit modifications.
  • Extensive Experience coordinating environmental audits of automotive manufacturing and parts facilities, and developing strategies to respond to audit findings.