This pilot leverages National Water Quality Assessment (NAWQA) stream health data collected in Oregon’s Willamette River Valley and Washington’s Puget Sound to estimate the economic value of water quality in this region of the Pacific Northwest. The USGS NAWQA Program is currently conducting a regional assessment of water-quality, habitat stressors, and biological communities (including salmon) in the Willamette River Valley and Puget Sound, with the overall goal of evaluating the relative importance of factors affecting stream health throughout the region. Sampling will take place across more than eighty stream sites in the region to analyze gradients of human disturbance, characterize chemical stressors,...