Toxic Biosolids Threaten U.S. Farmland and Livestock
Kurt Cobb is a freelance writer and communications consultant who writes frequently about energy and environment. His work has also appeared in The Christian Science…
Many years ago a civil engineer explained to me the wisdom of taking solid biological residues from sewage treatment plants—dubbed biosolids—and using them on farm fields and garden plots. After all, nature intended for human wastes to return to the soil to replenish it in the same way animal manure has long been used to fertilize farm fields.
"What about all the industrial chemicals that end up in wastewater," I asked. He replied that these weren't significant enough to be concerned. I was skeptical.
Fast forward to last week when the U.S. Congress took up a proposal to allocate $500 million to compensate farmers whose livelihoods have been undermined by applying biosolids—what most of us call sewage sludge—to their cropland. It turns out that those biosolids have poisoned both land and livestock across the United States. The ostensible concern is so-called "forever chemicals," ones used to make such products as Teflon, firefighting foam, stain-resistant upholstery and water-resistant sports gear. These chemicals are linked to "cancer, liver damage, decreased fertility, and increased risk of asthma and thyroid disease." They are dangerous to human and animal health even at very low levels. The U.S. Environmental Protection Agency (EPA) this year proposed limiting certain of these chemicals to less than 10 parts per trillion in drinking water. In two cases, the proposed limit is 4 parts per trillion.
A recent study of 2,500 human subjects showed that nearly all of them have PFAS chemicals—the formal name for this group of chemicals which number in the thousands—in their blood. Some 1,593 water systems in the United States are known so far to be contaminated . These chemicals ought to have the description "everywhere chemicals" added to their name.
