From 2016-2019, Herrera worked with the City of Redmond to perform analyses on water quality grab sample data collected from three sites in the Monticello basin in Redmond, Washington. This analysis aims to determine trends in water quality can be attributed to increased street sweeping frequency in the basin. In total, 44 storm samples and 16 base flow samples were collected from each of the three sites and analyzed for total suspended solids (TSS), total phosphorus (TP), particulate copper and particulate zinc.