The Regional Stream Quality Assessment (RSQA) is a part of the National Water Quality Assessment project. The goals of the RSQA are to characterize multiple water-quality factors that are stressors to aquatic life (contaminants, nutrients, sediment, and streamflow alteration) and to develop a better understanding of the relation of these stressors to ecological conditions in streams throughout the region.
The RSQA Results Viewer allows the user to visualize water quality factors that were assessed by the RSQA study, including total nitrogen, total phosphorus, dissolved oxygen, pesticide toxicity, sediment contaminants, pyrethroid pesticides, riparian buffers, fine sediment, and fish and macroinvertebrate community condition.
The RSQA Data Downloader provides access to the water quality data from the RSQA study. Data can be filtered by region, state, and county.