One possible source of the chemical contamination being investigated by the town: Fertilizers used by area farmers, including some using treated sewage waste from the Potomac River.
“We’re very concerned about biosolids and fertilizers. So we know those come from wastewater treatment plants. And we know they have high levels of PFOS., very, very high levels, astronomically high levels. And we know the farmers in these areas are using them. And they don’t know they’re dangerous,” explained Executive Director of Public Employees for Environmental Responsibility Timothy Whitehouse.