This raster dataset depicts a geography of wet nitrogen deposition for the nine county San Francisco Bay Area Region, California. Wet nitrogen deposition is the input of reactive nitrogen from the atmosphere into the biosphere as dry deposition, or acidic rain, fog and snow. An overabundance of nitrogen in the atmosphere and the environment has deleterious effects on the biosphere. The source data was produced by the Center for Conservation Biology at the University of California, Riverside (UCR) and is based on a nitrogen deposition model data developed by the UCR College of Engineering Center for Environmental Research and Technology (CE-CERT). Text values from the dry nitrogen deposition model were processed to provide the values stored in this raster. The model used here is total annual deposition and based on data from calendar year 2002. These data are considered useful in studying the effect of nitrogen deposition on aspects of complex biological systems. This dataset was developed/compiled for use in the San Francisco Bay Area Upland Habitat Goals Project, a Project used to identify a Conservation Lands Network (CLN) for biodiversity preservation to inform conservation investments and lasting cooperative conservation partnerships. The Conservation Lands Network GIS Database is the primary output of the Project. The data depicts the spatially explicit CLN that is recommended for the nine county San Francisco Bay Area Region, California. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.