Kenneth Sansone

Senior Partner

Ken Sansone is Senior Partner at SL Environmental Law Group PC, where he exclusively represents states, municipalities, utilities, airports, and private entities in contamination lawsuits, including claims over PFAS, 1,4-dioxane, perchlorate, and 1,2,3-Trichloropropane (TCP). As part of his work at SL Environmental Law Group, Ken is actively involved in representing more than 280 entities in the Aqueous Film-Forming Foam multi-district litigation against PFAS manufacturers (AFFF MDL No. 2873). SL Environmental Law Group anticipates recovering nearly $1 billion for its clients from the first phase of the 3M and DuPont settlements alone, with additional recoveries expected from settlements with other manufacturers. Ken has also obtained more than $155 million in recoveries for water systems to treat TCP, a toxic contaminant from defective pesticides sold by Shell Oil and Dow Chemical.

Ken served as lead trial and appellate counsel to the City of Pomona, for which he obtained a $30.2M recovery for the costs of cleaning up perchlorate contamination from the use of tainted fertilizer products made by SQM, a multinational mining company.

Prior to joining SL, Ken served as an Assistant Attorney General for the State of New Hampshire.  He has more than 20 years of experience handling complex civil and criminal cases in federal and state trial and appellate courts.

Ken received his law degree from New York University and his undergraduate degree, magna cum laude, from Duke University, where he was alternate captain of the men's ice hockey team.

Ken Sansone is licensed to practice law in California, Massachussetts, and New Hampshire.

Recent articles:

Recent Speaking Engagements:

  • National Association of Clean Water Agencies (NACWA) Virtual Session, December 2024
  • Association of Metropolitan Water Agencies (AMWA) Executive Management Conference, October 2024  
  • International City/County Management Association (ICMA) Annual Conference, September 2024  
  • American Water Works Association (AWWA) 2023 Annual Conference & Exhibition, June 2023