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Noah Perch-Ahern is a preeminent environmental and energy attorney and maintains a national practice involving complex litigation, regulatory counsel, transactional matters, and project development.

Having not only deep knowledge across the field of environmental law but also wide-ranging experience advising clients in various practice areas, Noah employs his skills and knowledge in a variety of contexts. He has significant litigation experience and has tried jury and bench trials. At the same time, Noah regularly helps clients devise solutions to difficult regulatory problems, represents clients in administrative proceedings and enforcement matters, assists with deals and development projects, and represents clients in energy-related transactions and industrial and real estate acquisitions.

Noah has played a key role in a variety of high stakes matters, including cost recovery and tort actions involving Superfund sites, constitutional litigation, public utility litigation, appellate litigation, environmental remediation projects, portfolio deals concerning electric generation facilities, landfills, and downstream petroleum assets, development projects related to renewable energy projects and industrial expansion, and compliance, permitting, and enforcement matters concerning air quality, water quality, hazardous waste, and energy and utility regulation.

Noah has counseled clients concerning all of the major federal environmental statutes, including CERCLA, RCRA, the Clean Water Act, the Clean Air Act, and NEPA, and has also advised clients concerning various state environmental statutes and regulations around the country, including regulatory programs related to climate change and cap-and-trade, coastal regulations, Brownfield laws, water rights, and land use regulations such as CEQA. A significant portion of Noah’s work involves complex air quality matters and sophisticated regulatory challenges.

Noah’s accomplishments have been professionally recognized in Chambers USA, Super Lawyers, and Benchmark Litigation.

    • TreePeople, Vice Chair and Member of Board of Directors
    • TreePeople Land, Vice Chair and Member of Board of Directors
    • Los Angeles Area Chamber of Commerce, Co-Chair of Water, Energy & Environmental Sustainability Council
    • Young Professionals in Energy Los Angeles (YPE), President Emeritus
    • Southern California Water Committee (SCWC), Former Board of Trustees
    • Chambers USA, Leading Lawyer in Environmental Law, 2025, 2026
    • Benchmark Litigation, 2018 - 2026
    • Los Angeles Business Journal, Thriving in Their 40's, 2024
    • Next Generation Lawyer of the Year, Century City Bar Association, 2018
    • Southern California Super Lawyers, Rising Stars, 2018 - 2020
    • Southern California Super Lawyers, 2026
    • California, 2009
    • District of Columbia, 2007
    • United States District Court for the Southern, Eastern, Central, and Northern Districts of California
    • United States Court of Appeals for the Ninth Circuit
    • Tulane University (J.D., magna cum laude)
    • University of New Hampshire (B.A., summa cum laude)
      • Political Science
      • Phi Beta Kappa