On December 22, citing security concerns, the U.S. Department of the Interior (DOI) announced that it was pausing leases for all offshore wind projects currently under construction. The stop-work order blocks further construction of Vineyard Wind 1, Revolution Wind, Coastal Virginia Offshore Wind, Sunrise Wind, and Empire Wind 1. All five projects had obtained leases

September 2, 2021, the Environmental Protection Agency (EPA), in collaboration with the Department of Defense (DOD), released the first EPA-validated laboratory analytical method to test for per- and polyfluoroalkyl substances (PFAS) in eight different environmental media. Method 1633, currently in draft form, is a single-laboratory validated method to test for 40 PFAS compounds in wastewater,