The cases have spurred new pet food safety rules and poultry surveillance efforts.

Levels of PFAS in sewage sludge used as fertilizer can pose risks that sometimes exceed safety thresholds “by several orders of magnitude,” the agency said.

Consumer and food safety groups have long urged the agency to revoke the use of this dye and others. The F.D.A. says there still is no evidence it is a human carcinogenic.

Wastewater, even after treatment to make it drinkable, contains high levels of PFAS, according to researchers.

While some agree with Robert F. Kennedy Jr. that the agency needs reform, their ideas for fixing it are very different from his.

A company controlled by Goldman Sachs is helping to lead a lobbying effort by makers of fertilizer linked to “forever chemicals.”

© Hannah Beier for The New York Times

New federal rules call for testing unpasteurized milk from dairy processors and for farm owners to provide details that would help officials identify and track cases more easily.

© Tim Gruber for The New York Times

A company controlled by Goldman Sachs is helping to lead a lobbying effort by makers of fertilizer linked to “forever chemicals.”

© Hannah Beier for The New York Times

Federal health agencies closed their investigations into the bacterial outbreak that sickened 104 people and was linked to onions on the fast-food chain’s signature Quarter Pounders.

© Charles Rex Arbogast/Associated Press