The 2021 edition of U.S. News - Best Lawyers has named Arnold & Porter as a "Law Firm of the Year" in the "Environmental Law" category. The firm also received 44 national rankings and 105 metropolitan rankings (Chicago, DC, Denver, Houston, Los Angeles, New York, San Francisco, and San Jose) in the "Best Law Firms" report.

"Law Firm of the Year" recognitions are based on the overall performance of a firm in their designated practice area and client feedback on firm performance, responsiveness, and cost effectiveness. Firms receiving "Law Firm of the Year" recognitions also have "an impressive overall performance" as reflected in the research conducted by Best Lawyers. The recognitions are named for 75 nationally ranked practice areas.

Arnold & Porter's Environment practice, which is led by chair Brian Israel, excels at representing clients in high-stakes, complex environmental matters spanning the landscape of environmental law, including significant environmental enforcement actions, high-profile toxic tort class actions and regulatory counseling. The firm's Environmental practice also specializes in climate change and renewable fuels issues, including counseling, permitting, and litigation. The firm's national Environmental practice has been consistently ranked in the top tier by Best Lawyers since 2011.

Arnold & Porter's ranked national practice areas in the "Best Law Firms" report include:

  • Antitrust Law
  • Appellate Practice
  • Banking and Finance Law
  • Bankruptcy and Creditor Debtor Rights/Insolvency and Reorganization Law
  • Biotechnology Law
  • Commercial Litigation
  • Corporate Law
  • Criminal Defense: White-Collar
  • Derivatives and Futures Law
  • Employee Benefits (ERISA) Law
  • Energy Law
  • Environmental Law
  • FDA Law
  • Financial Services Regulation Law
  • Health Care Law
  • Information Technology Law
  • International Arbitration - Commercial
  • International Arbitration - Governmental
  • International Trade and Finance Law
  • Leveraged Buyouts and Private Equity Law
  • Litigation - Antitrust
  • Litigation - Banking & Finance
  • Litigation - Bankruptcy
  • Litigation - Environmental
  • Litigation - Intellectual Property
  • Litigation - Patent
  • Litigation - Regulatory Enforcement (SEC, Telecom, Energy)
  • Litigation - Securities
  • Mass Tort Litigation / Class Actions - Defendants
  • Mergers & Acquisitions Law
  • Natural Resources Law
  • Patent Law
  • Private Funds / Hedge Funds Law
  • Public Finance Law
  • Real Estate Law
  • Securities / Capital Markets Law
  • Securities Regulation
  • Securitization and Structured Finance Law
  • Tax Law
  • Technology Law
  • Trademark Law
  • Transportation Law
  • Trusts & Estates Law
  • Venture Capital Law