In early 2000, scientists at 3M, the chemicals giant, made a startling discovery: High levels of PFAS, the virtually indestructible “forever chemicals” used in nonstick pans, stain-resistant carpets and many other products were turning up in the nation’s sewage.
The researchers were concerned. The data suggested that the toxic chemicals, made by 3M, were fast becoming ubiquitous in the environment. The company’s research had already linked exposure to birth defects, cancer and more.
That sewage was being used as fertilizer on farmland nationwide, a practice encouraged by the Environmental Protection Agency. The presence of PFAS in the sewage meant those chemicals were being unwittingly spread on fields across the country.
3M didn’t publish the research, but the company did share its findings with the E.P.A. at a 2003 meeting, according to 3M documents reviewed by the The New York Times. The research and the E.P.A.’s knowledge of it has not been previously reported.
Today, the E.P.A. continues to promote sewage sludge as fertilizer and doesn’t require testing for PFAS, despite the fact that whistle-blowers, academics, state officials and the agency’s internal studies over the years have also raised contamination concerns.
“These are highly complex mixtures of chemicals,” said David Lewis, a former E.P.A. microbiologist who in the late 1990s issued early warnings of the risks in spreading sludge on farmland. The soil “becomes essentially permanently contaminated,” he said in a recent interview from his home in Georgia.