The 3M Co. supplied products containing fluorinated chemicals to four of the five sites New Jersey officials have identified as major sources of contamination, according to documents obtained by Bloomberg Environment.

Some of 3M’s products, including Scotchgard and its firefighting foam Light Water, contained per- and polyfluoroalkyl substances, also known as PFAS. Between 1995 and 2005, the company sold products containing PFAS, including the firefighting foam, a surfactant, and an emulsifier, to the companies or agencies that own PFAS-contaminated sites in New Jersey, according to a letter the company sent to the state May 24....