BOSTON — Brenda Hampton first came across the toxic industrial compound PFAS after finding it was part of the cocktail of contaminants that tainted the drinking water in her North Alabama community. Hampton, who believes the contaminated water contributed to kidney problems she and other residents suffer, soon learned the chemicals were found in another source that hit close to home — fast food wrappers, boxes and plates. Knowing her three daughters and eight grandchildren ate their share of burgers and fries, she joined the national fight in 2020 to ban PFAS in food packaging. “Everybody is eating fast food.