On May 2, 2018, the U.S. Environmental Protection Agency (EPA) published a Federal Register notice announcing publication of its Final 2016 Effluent Guidelines Program Plan.  The Plan describes EPA’s Clean Water Act rulemakings and other actions intended to control industrial wastewater pollution.  According to the Plan, EPA continued several ongoing investigations, including one on

Environmental Science & Technology posted on April 5, 2011, an article entitled “Behavior of Metallic Silver Nanoparticles in a Pilot Wastewater Treatment Plant.” The abstract states:

We investigated the behavior of metallic silver nanoparticles (Ag-NP) in a pilot wastewater treatment plant (WWTP) fed with municipal wastewater.  The treatment plant consisted of a nonaerated and