Tag Archives: “risk assessment”

PFAS Concerns – Real Hazard or Just Outrage?

Concern about the impacts of Poly- and Perflouroalkyl Substances is extensive and growing.  Without seeking to downplay the potential risks from PFAS exposure, I do think that the way we are addressing PFAS demonstrates everything that’s wrong about how we talk about, assess, and respond to environmental risk in the United States.

Exhibit 1 for my view is Senator John Barrasso, the Republican chair of the Senate Committee on Environment and Public Works.  … More

Hoist on Its Own Petard: The Ninth Circuit Reverses EPA’s Approval of Nanosilver Pesticides in Textiles

Last week, the 9th Circuit Court of Appeals remanded EPA’s approval of two nanosilver pesticides for use in textiles.  The case, NRDC v. EPA, is a fascinating application of the issue of “how safe is safe” and, in particular, how much conservatism must be applied to risk estimates when there is significant uncertainty in the analysis.

EPA sets the acceptable exposure to pesticides under FIFRA by determining the risk and then addressing uncertainties. … More