Transforming Urban Water Initiative
From Gray to Green Shorelines
Water quality monitoring findings reveal several key components. First, the Oro Loma Horizontal Levee significantly removes wastewater-derived contaminants while providing valuable habitat. Some contaminants that were found to be removed were nitrogen, phosphate and pharmaceuticals. Second, contaminant removal was influenced by hydrology more than other design and operational parameters. Subsurface flow is the key! Finally, that nitrogen was removed by microbial processing within the horizontal levee design.