Critical Loads Tools and Reports
Access the relevant website and a step-by-step guide for using the website.
CLAS–Critical Loads Assessment by Site
EPA CL Mapper
Air Quality Conditions & Trends
National Parks
Air Quality Conditions & Trends
National Forests
Air Quality Conditions & Trends
U.S. Fish and Wildlife Service
CLAD CL Summary Reports
Wilderness Air Quality Values for WSP (Wilderness Stewardship Performance)
Forest Vulnerability Hotspots Mapper (USFS)
Step-by-step instructions