The U.S. Department of Energy (DOE) requires that all its site facilities develop an annual site environmental report to comply with DOE Order 231.1B, Chg 1, Environment, Safety and Health Reporting, and DOE Order 458.1, Admin Chg 3, Radiation Protection of the Public and the Environment. This report provides a synopsis of calendar year 2018 information related to environmental management performance and compliance efforts at Pacific Northwest National Laboratory. It summarizes site compliance with federal, state, and local environmental laws, regulations, policies, directives, permits, and Orders, and provides environmental management performance benchmarks and their status to the public, regulatory agencies, community officials, Native American tribes, and public interest groups.