Air Quality -- Visibility

Park views are often obscured, most frequently in the summer. Contributions of air pollutants from vehicle emissions, agricultural activities, prescribed and wildland fire, and other sources of fine particles limit the visitor experience in these parks.

A good way to learn more about air quality problems in our national parks is to view the network of National Park Service webcams. The website also provides a wealth of data on air quality over time.

Go to the Giant Forest Webcam page > > >
Two views of the valley below the parks, one with a thick gray blanket of pollution hiding the foothills, the other with clear air showing several ranges of foothills
Bad visibility from the western edge of Giant Forest in Sequoia National Park, looking west toward the San Joaquin Valley and the Coast Range. To the right is the same view on a day with good air quality.

NPS Photos

Last updated: February 14, 2019

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