In May 2019, researchers from EPA's Office of Air & Radiation and EPA's Office of Research & Development collaborated with the scientific community through NADP's TDEP committee to synthesize the current state of the science related to nitrogen deposition budgets. Read the published paper.
In April 2019, CASTNET closed the site in Howland, Maine (HOW191) after eight years of operation.
In May 2019, the CASTNET site in Duke Forest, NC (DUK008) installed an ozone analyzer.
In March 2017, CASTNET added a site in Chaco Canyon National Historical Park (CHC432).