Farm families that consume milk, eggs and beef they raise themselves face an increased risk of cancer if their fields were fertilized with PFAS-laced sewage sludge, the EPA reported this week. The results do not suggest that the broader food supply is contaminated.

Chemicals found in sewage sludge that some farmers use to fertilize fields and pastures can pose a threat to human and animal health, the US Environmental Protection Agency said Tuesday.

The E.P.A.’s report follows a growing body of research that has found that sludge can be contaminated with human-made “forever chemicals” known as per- and polyfluoroalkyl substances, or PFAS, which are used in a wide range of household items such as nonstick cookware, waterproof clothing and stain-resistant carpets.