Dry Deposition Maps

This page includes maps showing annual average dry deposition estimated with the TDep Measurement Model Fusion method using the measured air concentrations from CASTNET and modeled CMAQ deposition velocities and fluxes.

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YearNitrogenReduced NitrogenOxidized NitrogenAmmoniumSulfurDry Reduced N as Pct of Total NDry Nitrogen as Pct of Total NDry Sulfur as Pct of Total S
Animated GIFTotal deposition of nitrogen 2000-2023Total deposition of reduced nitrogen 2000-2023Dry deposition of oxidized nitrogen 2000-2023Dry deposition of particle ammonium 2000-2023Dry deposition of sulfur 2000-2023Percent of total nitrogen as dry reduced nitrogen 2000-2023Percent of total nitrogen as dry deposition 2000-2023Percent of total sulfur as dry deposition 2000-2023
2022-2024Dry deposition of nitrogen 2021-2023Dry deposition of reduced nitrogen 2021-2023Dry deposition of oxidized nitrogen 2021-2023Dry deposition of particle ammonium 2021-2023Dry deposition of sulfur 2021-2023Percent of total nitrogen as dry reduced nitrogen 2021-2023Percent of total nitrogen as dry deposition 2021-2023Percent of total sulfur as dry deposition 2021-2023
2000-2002Dry deposition of nitrogen 2000-2002Dry deposition of reduced nitrogen 2000-2002Dry deposition of oxidized nitrogen 2000-2002Dry deposition of particle ammonium 2000-2002Dry deposition of sulfur 2000-2002Percent of total nitrogen as dry reduced nitrogen 2000-2002Percent of total nitrogen as dry deposition 2000-2002Percent of total sulfur as dry deposition 2000-2002
2024Dry deposition of nitrogen for 2024Dry deposition of reduced nitrogen for 2024Dry deposition of oxidized nitrogen for 2024Dry deposition of particle ammonium for 2024Dry deposition of sulfur for 2024Percent of total nitrogen as dry reduced nitrogen for 2024Percent of total nitrogen as dry deposition for 2024Percent of total sulfur as dry deposition for 2024
2023Dry deposition of nitrogen for 2023Dry deposition of reduced nitrogen for 2023Dry deposition of oxidized nitrogen for 2023Dry deposition of particle ammonium for 2023Dry deposition of sulfur for 2023Percent of total nitrogen as dry reduced nitrogen for 2023Percent of total nitrogen as dry deposition for 2023Percent of total sulfur as dry deposition for 2023
2022Dry deposition of nitrogen for 2022Dry deposition of reduced nitrogen for 2022Dry deposition of oxidized nitrogen for 2022Dry deposition of particle ammonium for 2022Dry deposition of sulfur for 2022Percent of total nitrogen as dry reduced nitrogen for 2022Percent of total nitrogen as dry deposition for 2022Percent of total sulfur as dry deposition for 2022
2021Dry deposition of nitrogen for 2021Dry deposition of reduced nitrogen for 2021Dry deposition of oxidized nitrogen for 2021Dry deposition of particle ammonium for 2021Dry deposition of sulfur for 2021Percent of total nitrogen as dry reduced nitrogen for 2021Percent of total nitrogen as dry deposition for 2021Percent of total sulfur as dry deposition for 2021
2020Dry deposition of nitrogen for 2020Dry deposition of reduced nitrogen for 2020Dry deposition of oxidized nitrogen for 2020Dry deposition of particle ammonium for 2020Dry deposition of sulfur for 2020Percent of total nitrogen as dry reduced nitrogen for 2020Percent of total nitrogen as dry deposition for 2020Percent of total sulfur as dry deposition for 2020
2019Dry deposition of nitrogen for 2019Dry deposition of reduced nitrogen for 2019Dry deposition of oxidized nitrogen for 2019Dry deposition of particle ammonium for 2019Dry deposition of sulfur for 2019Percent of total nitrogen as dry reduced nitrogen for 2019Percent of total nitrogen as dry deposition for 2019Percent of total sulfur as dry deposition for 2019
2018Dry deposition of nitrogen for 2018Dry deposition of reduced nitrogen for 2018Dry deposition of oxidized nitrogen for 2018Dry deposition of particle ammonium for 2018Dry deposition of sulfur for 2018Percent of total nitrogen as dry reduced nitrogen for 2018Percent of total nitrogen as dry deposition for 2018Percent of total sulfur as dry deposition for 2018
2017Dry deposition of nitrogen for 2017Dry deposition of reduced nitrogen for 2017Dry deposition of oxidized nitrogen for 2017Dry deposition of particle ammonium for 2017Dry deposition of sulfur for 2017Percent of total nitrogen as dry reduced nitrogen for 2017Percent of total nitrogen as dry deposition for 2017Percent of total sulfur as dry deposition for 2017
2016Dry deposition of nitrogen for 2016Dry deposition of reduced nitrogen for 2016Dry deposition of oxidized nitrogen for 2016Dry deposition of particle ammonium for 2016Dry deposition of sulfur for 2016Percent of total nitrogen as dry reduced nitrogen for 2016Percent of total nitrogen as dry deposition for 2016Percent of total sulfur as dry deposition for 2016
2015Dry deposition of nitrogen for 2015Dry deposition of reduced nitrogen for 2015Dry deposition of oxidized nitrogen for 2015Dry deposition of particle ammonium for 2015Dry deposition of sulfur for 2015Percent of total nitrogen as dry reduced nitrogen for 2015Percent of total nitrogen as dry deposition for 2015Percent of total sulfur as dry deposition for 2015
2014Dry deposition of nitrogen for 2014Dry deposition of reduced nitrogen for 2014Dry deposition of oxidized nitrogen for 2014Dry deposition of particle ammonium for 2014Dry deposition of sulfur for 2014Percent of total nitrogen as dry reduced nitrogen for 2014Percent of total nitrogen as dry deposition for 2014Percent of total sulfur as dry deposition for 2014
2013Dry deposition of nitrogen for 2013Dry deposition of reduced nitrogen for 2013Dry deposition of oxidized nitrogen for 2013Dry deposition of particle ammonium for 2013Dry deposition of sulfur for 2013Percent of total nitrogen as dry reduced nitrogen for 2013Percent of total nitrogen as dry deposition for 2013Percent of total sulfur as dry deposition for 2013
2012Dry deposition of nitrogen for 2012Dry deposition of reduced nitrogen for 2012Dry deposition of oxidized nitrogen for 2012Dry deposition of particle ammonium for 2012Dry deposition of sulfur for 2012Percent of total nitrogen as dry reduced nitrogen for 2012Percent of total nitrogen as dry deposition for 2012Percent of total sulfur as dry deposition for 2012
2011Dry deposition of nitrogen for 2011Dry deposition of reduced nitrogen for 2011Dry deposition of oxidized nitrogen for 2011Dry deposition of particle ammonium for 2011Dry deposition of sulfur for 2011Percent of total nitrogen as dry reduced nitrogen for 2011Percent of total nitrogen as dry deposition for 2011Percent of total sulfur as dry deposition for 2011
2010Dry deposition of nitrogen for 2010Dry deposition of reduced nitrogen for 2010Dry deposition of oxidized nitrogen for 2010Dry deposition of particle ammonium for 2010Dry deposition of sulfur for 2010Percent of total nitrogen as dry reduced nitrogen for 2010Percent of total nitrogen as dry deposition for 2010Percent of total sulfur as dry deposition for 2010
2009Dry deposition of nitrogen for 2009Dry deposition of reduced nitrogen for 2009Dry deposition of oxidized nitrogen for 2009Dry deposition of particle ammonium for 2009Dry deposition of sulfur for 2009Percent of total nitrogen as dry reduced nitrogen for 2009Percent of total nitrogen as dry deposition for 2009Percent of total sulfur as dry deposition for 2009
2008Dry deposition of nitrogen for 2008Dry deposition of reduced nitrogen for 2008Dry deposition of oxidized nitrogen for 2008Dry deposition of particle ammonium for 2008Dry deposition of sulfur for 2008Percent of total nitrogen as dry reduced nitrogen for 2008Percent of total nitrogen as dry deposition for 2008Percent of total sulfur as dry deposition for 2008
2007Dry deposition of nitrogen for 2007Dry deposition of reduced nitrogen for 2007Dry deposition of oxidized nitrogen for 2007Dry deposition of particle ammonium for 2007Dry deposition of sulfur for 2007Percent of total nitrogen as dry reduced nitrogen for 2007Percent of total nitrogen as dry deposition for 2007Percent of total sulfur as dry deposition for 2007
2006Dry deposition of nitrogen for 2006Dry deposition of reduced nitrogen for 2006Dry deposition of oxidized nitrogen for 2006Dry deposition of particle ammonium for 2006Dry deposition of sulfur for 2006Percent of total nitrogen as dry reduced nitrogen for 2006Percent of total nitrogen as dry deposition for 2006Percent of total sulfur as dry deposition for 2006
2005Dry deposition of nitrogen for 2005Dry deposition of reduced nitrogen for 2005Dry deposition of oxidized nitrogen for 2005Dry deposition of particle ammonium for 2005Dry deposition of sulfur for 2005Percent of total nitrogen as dry reduced nitrogen for 2005Percent of total nitrogen as dry deposition for 2005Percent of total sulfur as dry deposition for 2005
2004Dry deposition of nitrogen for 2004Dry deposition of reduced nitrogen for 2004Dry deposition of oxidized nitrogen for 2004Dry deposition of particle ammonium for 2004Dry deposition of sulfur for 2004Percent of total nitrogen as dry reduced nitrogen for 2004Percent of total nitrogen as dry deposition for 2004Percent of total sulfur as dry deposition for 2004
2003Dry deposition of nitrogen for 2003Dry deposition of reduced nitrogen for 2003Dry deposition of oxidized nitrogen for 2003Dry deposition of particle ammonium for 2003Dry deposition of sulfur for 2003Percent of total nitrogen as dry reduced nitrogen for 2003Percent of total nitrogen as dry deposition for 2003Percent of total sulfur as dry deposition for 2003
2002Dry deposition of nitrogen for 2002Dry deposition of reduced nitrogen for 2002Dry deposition of oxidized nitrogen for 2002Dry deposition of particle ammonium for 2002Dry deposition of sulfur for 2002Percent of total nitrogen as dry reduced nitrogen for 2002Percent of total nitrogen as dry deposition for 2002Percent of total sulfur as dry deposition for 2002
2001Dry deposition of nitrogen for 2001Dry deposition of reduced nitrogen for 2001Dry deposition of oxidized nitrogen for 2001Dry deposition of particle ammonium for 2001Dry deposition of sulfur for 2001Percent of total nitrogen as dry reduced nitrogen for 2001Percent of total nitrogen as dry deposition for 2001Percent of total sulfur as dry deposition for 2001
2000Dry deposition of nitrogen for 2000Dry deposition of reduced nitrogen for 2000Dry deposition of oxidized nitrogen for 2000Dry deposition of particle ammonium for 2000Dry deposition of sulfur for 2000Percent of total nitrogen as dry reduced nitrogen for 2000Percent of total nitrogen as dry deposition for 2000Percent of total sulfur as dry deposition for 2000
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Last updated on December 16, 2025