National Park Management
Access the relevant website and a step-by-step guide for using the website.
WHAT ARE CRITICAL LOADS AND WHY DO THEY MATTER?
IDENTIFY RESOURCES AT RISK FROM N OR S AIR POLLUTION
NPS PARK AIR PROFILES
CONDITIONS AND TRENDS OF POLLUTANTS AND ECOSYSTEM HEALTH IN NPS UNITS
REPORTS ON CRITICAL LOADS AND CL EXCEEDANCES WITHIN NPS UNITS
INTERACTIVE MAPS OF CRITICAL LOADS AND EXCEEDANCES
(This website cannot be embedded)
Step-by-step instructions
For each park, this site provides a narrative overview of current risk to 48 Class I National Parks from Nitrogen and Sulfur Pollution, Ozone, Persistent Pollutants, and Visibility.
1. Select the NPS unit of interest either by clicking on the map or selecting it from the dropdown menu.