Description: The raster data represent the amount of Wet Nitrate Deposition in Kilograms per Hectare from 20011-2013. This map data is more recent than the 2004-2006 Wet Nitrate Deposition data found on page 38 of the Environmental Protection Agency’s Report on the Environment - 2008 (EPAROE_Final_2008.pdf). Summary data in this indicator were provided by EPA’s Office of Atmospheric Programs, based on deposition data from two sources. Wet deposition data are from the National Atmospheric Deposition Program/National Trends Network (NADP, 2007) (http://nadp.sws.uiuc.edu/), and dry deposition data are from the Clean Air Status and Trends Network (U.S. EPA, 2007) (http://www.epa.gov/castnet). This indicator aggregates data across 3-year periods to avoid influences from short-term fluctuations in meteorological conditions, and wet deposition data were interpolated among monitoring stations to generate the maps shown in Exhibits 2-29 and 2-30. <br><A HREF="https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid={9EE63C90-2945-44A2-A0BA-538B08801051}" target="_blank"><IMG SRC="https://edg.epa.gov/clipship/doc/metadata.png" BORDER=0></A>