Puget Sound Marine Waters 2020 Overview

The tenth annual Puget Sound Marine Waters Overview looks at marine water quality and other conditions in the region in 2020. According to the report, there were few extreme weather or ecological events in 2020, but overall, conditions in Puget Sound were generally warmer, sunnier, and wetter than in typical years. The overview also examines patterns and trends in numerous environmental parameters, including plankton, water quality, climate, and marine life. 

Report cover
Report cover


This report provides a collective view of 2020 Puget Sound marine water quality and conditions and associated biota from comprehensive monitoring and observing programs. While the report focuses on the marine waters of greater Puget Sound, additional selected conditions are also included due to their influence on Puget Sound waters. These include large-scale climate indices and conditions along the Washington coast. It is important to document and understand regional drivers of variability and patterns on various timescales so that water quality data may be interpreted with these variations in mind, to better attribute human effects versus natural variations and change. This is the tenth annual report produced for the PSEMP Marine Waters Workgroup. Our message to decision makers, policy makers, managers, scientists, and the public who are interested in the health of Puget Sound follows. 

View the full report