NADP > Critical Loads Hub > CL and Deposition Data > CL TDEP MAPS

CL Deposition and Data

Access the relevant website and a step-by-step guide for using the website.

National Critical Loads Database (NCLD)

Lichens & Air Quality Database (USFS)

NADP TDep (Total Deposition) Maps

CMAQ

CASTNET

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Step-by-step instructions

  1. Scroll to ‘Total Deposition Maps’ and click on the link to ‘Download current Grids from EPA’s server’.
  2. TDep data is provided for individual years and 3-year averages. Select the year and chemical species of interest. For a detailed list of what each file contains see:
https://gaftp.epa.gov/castnet/tdep/Total_Deposition_Documentation_current.pdf