Dixon Pike has been with the firm's Environmental Practice Group since 1987 and has extensive experience assisting clients with environmental permitting, compliance, and enforcement issues with particular focus on state and federal air laws, pollution prevention initiatives, and toxics reduction requirements.  Dixon has long been included as a leading environmental attorney by Chambers USA and The Best Lawyers in America®, and was honored as Best Lawyers’ Portland, Maine Environmental "Lawyer of the Year" in 2018 and 2012, the inaugural edition of the award.  Dixon also has achieved the highest professional rating, AV® Preeminent, awarded by Martindale-Hubbard Law Directory.

Dixon has been involved in hundreds of air quality permitting, regulatory and enforcement activities, representing a wide variety of business and manufacturing interests, including pulp and paper, semi-conductor, forest products, electric utility, leather tanning, textile, food products, petroleum storage and distribution, metal products, landfill gas-to-energy and biomass boilers. He has assisted businesses in over a dozen states with air issues, including, most recently, Clean Air Act PSD and Title V permitting, MACT compliance, responding to EPA PSD/NSR compliance reviews and enforcement efforts, BART requirements, offset certifications, use of alternative fuels, state and federal greenhouse gas requirements and advising Kazakhstan on its movement to a green economy. Dixon has served as national environmental counsel for a paper products company with facilities in five states and, for over 20 years, as counsel to the Maine Pulp and Paper Association's Environmental Committee.

Dixon's work has included: assisting clients to obtain PSD/NSR permits; netting out of PSD/NSR; dealing with Federal Land Managers on BART and visibility impact issues; creating, transferring and using NOx and VOC emission reduction credits to satisfy nonattainment new source review offset requirements; MACT applicability and compliance; obtaining a Clean Air Act Section 182(f) waiver for the northern half of Maine; developing Clean Air Act § 112 Risk Management Plans; OSHA Process Safety Management requirements; release reporting; Title V compliance certifications; and defending major enforcement actions brought under federal and state air laws. Over his career, Dixon has been successful in helping clients achieve their goals without resorting to litigation.

Dixon has participated in virtually all Maine air quality legislative and regulatory processes that form Maine’s air quality protection and improvement program and has been involved in many federal Clean Air Act rulemakings. Dixon has also performed numerous environmental audits and advised clients on a wide range of other environmental law issues, including hazardous waste, asbestos, pollution prevention, land use and chemical safety issues.

Dixon has been involved in numerous administrative and judicial appeals of agency actions. He also engages in a substantial amount of legislative work, primarily legislative issues under consideration by the Maine Joint Standing Committee on Natural Resources and regularly advocates before the Maine Board of Environmental Protection on rulemaking and permitting matters.

Honors & Distinctions

  • Named "Lawyer of the Year" in Portland, Maine by The Best Lawyers in America® for Environmental Law in 2018 and 2012
  • Included in The Best Lawyers in America® for Environmental Law (2005-present)
  • Recognized by Chambers USA: America's Leading Business Lawyers for Environmental Law (Band 1)
  • Included in New England Super Lawyers for Environmental Law
  • Rated AV® Preeminent™, the highest rating available, by Martindale-Hubbell
  • Recognized by Who’s Who Legal 2017 for Environmental Law

Professional Activities

  • Member, Maine Air Toxics Advisory Committee, 2003-2010
  • Member, Maine Pollution Prevention Advisory Committee, 1989-1999 (Chair, 1996-99)
  • Member, Maine Air Quality Advisory Committee, 1992-2008
  • Member, Governor's Emissions Banking & Trading Advisory Committee, 1994-96
  • Member, Governor's Ozone Attainment Stakeholders Advisory Committee, 1993-94
  • Member, Maine DEP Toxics Use Reduction Act Stakeholders Advisory Committee, 2009-2011


Dixon has written and lectured extensively on federal and state air quality control regulations. He is a co-author of:

  • New England Regional published in American Bar Association, Natural Resources Section newsletters
  • "The Maine Air Permitting Handbook," 1996
  • "Environmental Law in Maine," (annual) 1991-
  • "Hazardous Waste in Maine," National Business Institute, 1990-1992;
  • "Chemical Safety & Hazardous Waste - New Issues in Maine," 1994 & 1996, The Cambridge Institute
  • "Turning on the Lights - Reporting Under SARA Title III Illuminates Tort and Environmental Liabilities," The Environmental Professional, 1989

Practice Areas

Representative Experience

  • Kazakhstan Transition to a Green Economy.  In 2014, Pierce Atwood was engaged to introduce Kazakhstan to transition to a green economy and to harmonize Kazakhstan’s laws with international best practices. Working together with local lawyers, Dixon was a member of a Pierce Atwood team who employed their expertise in the areas of waste management, water quality and water usage management, air emissions quality and renewable energy to draft amendments to numerous laws, including Kazakhstan’s Environmental Code, Water Code, Tax Code, Administrative Offences Code, Renewable Energy Law, and Electricity Law.
  • Addition of co-gen boiler. Assisted Georgia-Pacific Corporation in obtaining permits and approvals for installation of a new, large, multi-fuel, co-generation boiler. Approved fuels include C&D woodchips.

Representative Experience

  • Calpine Corporation Acquisition of Fore River Generating Station.  Served as lead outside local environmental counsel to Houston-based Calpine Corporation, on its purchase of the 809 MW Fore River Generating Station in North Weymouth, Massachusetts, from Chicago-based Exelon Corporation.
  • Biomass heating at engineered wood products facility. Served as lead counsel to a wood products facility in obtaining all required permits and approvals (including approval of NOx offsets for VOCs) for a new manufacturing line and a new biomass-fired central heating unit
  • Landfill gas-to-energy. Assisted Uniper Ridge Energy, LLC and Pine Tree Landfill obtain necessary permits for construction and operation of  gas-to-energy facilities.
  • Gas-fired power plant in Indiana. Assisted Acadia Bay LLC in connection with permitting of a 500 MW greenfield gas-fired electrical generation facility in Indiana.
  • Emission reduction credits for manufacturing facilities. Assisted a Maine pulp and paper mill and a waste-to- energy plant  create and certify NOx and VOC emission reduction credits Fuel Switches.  Assisted several Maine manufacturers to switch from residual oil to No. 2 oil and/or natural gas.
  • Relocate biomass boilers.  Assisted a forest products manufacturer to obtain air permits necessary to relocate biomass boilers from Canada to US.

Representative Experience

  • Emission reduction credits for manufacturing facilities. Assisted a Maine mill and a New Hampshire mill to create and certify NOx and VOC emission reduction credits and NOx emission reduction credits, respectively.
  • Satisfying BART. Assisted six facilities in Maine with Best Available Retrofit Technology (BART)-eligible units to demonstrate existing controls satisfy BART requirements.
  • MACT compliance. Advised dozens of facilities regarding compliance with MACT standards, including serving as lead counsel to a wood products company to obtain all permits needed to replace wood strand dryers with new low temperature dryers to comply with production-based MACT limits instead of installation of add-on controls.
  • Air emissions compliance. Successfully represented several large manufacturing facilities that underwent extensive PSD/NSR and Refrigerant (CFC, HCFC) compliance reviews by EPA. These reviews began with EPA information requests seeking large amount of information, in some cases dating back to the 1970s, with respect to virtually every capital project at the facilities and detailed review of compliance with Maine's EPA-approved State Implementation Plan regulations and EPA's New Source Performance Standards.