A critical need for prioritizing watersheds to monitor and model is an evaluation of land use characteristics that influence stormwater loads to the Estuary. Eight land use types have been identified as important for Southern California; however, the geology, contaminants of concern, and land use for the San Francisco Bay region are sufficiently different that it is not possible to use this classification system for the Bay Area. The Southern California study observed statistically significant differences for the following land use categories with regard to metal loadings: industrial, recreational, and open space land use. This project will develop land use classifications (e.g., urban, open space, industrial, etc.) for the Bay Area. In addition to land use, consideration of age and condition of the development (e.g., cracked pavement, poorly maintained facilities, gravel or dirt roads, etc.) will be included in the assessment. The project will identify the highest priority land use types to be monitored in the future in support of loading studies and will survey these monitoring sites to determine which sites are logistically feasible.