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
Step-by-step instructions
Data is in tables (CSV) and GIS (geodatabase) format and can be directly downloaded from the site in zip format. See NCLD Document_v321.pdf for detail descriptions of data, how to use the critical loads, and their citations.