Michael DiGiannantonio is a results-driven attorney with over 20 years of litigation and regulatory experience. He is a respected litigator with extensive large- and small-firm experience handling every stage of a case, from investigation through appeal in both state and federal courts nationwide.

His practice covers a broad range of complex matters, including product liability, class actions, contract disputes, antitrust, securities, environmental claims, employment discrimination, intellectual property, False Claims Act, construction, and transportation litigation.

A former federal law clerk and former law school professor of persuasive legal writing and oral advocacy, Michael brings precision, strategic insight, and professionalism to every matter. He is known for cultivating strong relationships with colleagues, clients, opposing counsel, and government regulators while achieving practical, effective results.

• Over 20 years of litigation and regulatory experience in state and federal courts nationwide
• Extensive experience in product liability, class actions, contract, antitrust, and securities litigation
• Former federal law clerk and former professor of persuasive legal writing and oral advocacy
• Skilled negotiator and case strategist with numerous successful settlements and disciplinary hearings
• Recognized for professionalism, strategic judgment, and collaborative approach to advocacy

• Navigating 1,4 Dioxane Compliance – Pumps & Systems (2025)
• 1,4 Dioxane in New York Water: Risks, Regulations, and Funding Options – NY Conference of Mayors Municipal Matter Magazine (2025)
• How Public Work Can Get Help Paying for PFAS Cleanup in Wastewater – American City & County (2025)
• Addressing the Costs of PFAS – Santa Cruz Sentinel (2024)
• Last Word – Where do Utility Legal Settlements for PFAS Stand (2024)
• Small Water Utilities Cannot Achieve PFAS Cleanup on Their Own (2024)
• How Phase II Drinking Water Settlement Class Members, Wastewater Utilities and Airports Should Prepare – Water Finance & Management (2024)
• How to CERLA’s New PFAS Regulations Impact Airports – Aviation Pros (2024)
• Where do Utility Legal Settlements for PFAS Stand? – Water Finance & Management (2024)
• How CERCLA’s PFOA, PFOS Designation Could Impact Wastewater Treatment – Wastewater Digest (2024)
• Putting Communities Ahead of Polluters – Wastewater Digest (2024)
• Our Water is Polluted with “Forever Chemical” Here’s How Some Agencies Are Stepping In – The San Diego Union Tribune (2023)
• Easing the Financial Burden of Treating PFAS-Contaminated Water – Journal of new England Water Works Association (2023)
• PFAS is Lining Up to be the Biggest and Costliest Environmental Hazard in History – the Municipal (2023)
• Treatment and Funding Options for Removing PFAS from Drinking Water – Waterworld (2023)
• PFAS is Lining Up to be the Most Expensive Environmental Hazard in History – Water Finance & Management (2023)
• Federal Judge Denies Attempt by 3M to Evade PFAS Accountability Federal Judge Denies Attempt by 3M to Evade PFAS Accountability – Water Finance & Management (2023)
• Facing Major Lawsuit, 3M to Stop Making ‘Forever Chemicals’ Facing Major Lawsuit, 3M to Stop Making ‘Forever Chemicals’ – Environment News Service (2023)
• Environmental Professionals Weigh in on PFAS Litigation for Airports Environmental Professionals Weigh in on PFAS Litigation for Airports – Aviation Pros (2023)
• What 3M’s Decision to Stop Making PFAS Means for Water Providers What 3M’s Decision to Stop Making PFAS Means for Water Providers – Water Finance & Management (2023)
• Q&A: Environmental Attorneys Weigh in on PFAS Lawsuits Q&A: Environmental Attorneys Weigh in on PFAS Lawsuits – Water Finance & Management (2022)
• Judge Denies 3M’s Attempts to Invoke the Government Contractor Defense in AFFF Multi-District Litigation Judge Denies 3M’s Attempts to Invoke the Government Contractor Defense in AFFF Multi-District Litigation – Water Online (2022)
• A Legal History of PFASA Legal History of PFAS – Water Finance & Management (2022)

• AWWA Michigan Section Annual Conference & Exhibits
• Washington Association of Sewer & Water Districts
• MI-WEA Wastewater Administrative Conference
• American Association of Airport Executives PFAS Working Group
• AGWT-AGWA Fall Conference
• Southern California Water Conference

• California, Illinois and Michigan
• US District Court Central District California
• US District Court Northern District Illinois

• University of Michigan Law School – Juris Doctor (2003)
• University of Michigan – Bachelor of Arts with Distinction, Political Science (2000)