by Council for Watershed Health
Council for Watershed Health2015
The San Gabriel River and its tributaries, the freshwater lakes of the San Gabriel Watershed, and the San Gabriel River Estuary have been listed as impaired waters according to the Clean Water Act owing to their high levels of a number of pollutants, including copper, lead, zinc, coliform bacteria, and trash. This study, a partnership between the Council for Watershed Health and University of California Cooperative Extension, focused on commercial plant nurseries as potential sites for polluted runoff. The study had four main components: (1) to identify sites for best management practices (BMPs) following a survey of existing water quality, (2) carry out non-structural BMPs at those sites, (3) determine their effectiveness through water quality monitoring, and (4) provide additional recommendations for improving pollutant loads. This final report details the nurseries of focus, the methodology, and results.