For more information about National Park Service air resources,
please visit http://www.nature.nps.gov/air/. Air Quality in
Parks Air pollution affects scenic and natural resources in
national parks, including lakes, streams, plants, and wildlife.
Click on the map or use the dropdown lists to find park and
network specific information on air quality conditions and
impacts. Class I NPS areas have the highest level of air quality
protection under the law. These areas are defined as national
parks larger than 6,000 acres or wilderness areas over 5,000
acres that were in existence when the Clean Air Act was amended
in 1977. Choose a Class I park from the map or the list above
for park specific air quality information. National park units
with significant natural resources are grouped into networks
based on similar ecosystems and management issues. Networks
provide a spatial framework for ecosystem assessment, research,
inventories, monitoring, and management. Choose an Inventory &
Monitoring (I&M) network from th