PFAS Legal Perspective “PFAS, a family of several thousand chemicals, does not biodegrade, stays in the environment, and has alarming and poorly understood toxicological effects,” says the spokesperson for Mid-Way Environmental Services. “Manufacturers of PFAS and those who utilize PFAS in their products, as well as users of firefighting foams, are liable for the presence of PFAS in the environment and humans. This risk derives from regulatory programs and common law, including trespass, nuisance, negligence, and strict responsibility.” PFAS, a family of several thousand chemicals, does not biodegrade, stays in the environment, and has alarming and poorly understood toxicological effects. There are some regulatory concerns posed by the manufacture, use, and presence of PFAS. These include costs of compliance and cost associated with the inability to manufacture or use, and costs related to noncompliance-penalties and injunctive relief. Other concerns include expenses incurred in investigation and remediation and natural resource damage.