Air Quality

Layer of blue smog over water and town viewed from an airplane
Skagway on a busy summer day with visible air effects

NPS photo


Southeast Alaska is known for its fresh air. The Southeast Alaska Inventory and Monitoring Network (SEAN) monitors airborne contaminants throughout national parks in Southeast Alaska including; Klondike Gold Rush National Historical Park, Sitka National Historical Park, and Glacier Bay National Park and Preserve.

The Airborne Contaminants monitoring program is designed to monitor contaminants every 10 years using a variety of methods including measuring amounts of nitrogen, sulfur and metals such as mercury. This is being done through the collection of lichens, which absorb elements in the atmosphere, and rain water collection. Additionally, the National Park Service is cooperating with the Tongass National Forest to continue data collection on 120 permanent biomonitoring plots throughout the region.

Scientific equipment in an open area among trees
The SEAN uses mutli-pronged approach to sample the atmosphere including wet deposition sampling, collection of lichens and biomonitoring plots.

NPS photo

Last updated: February 14, 2019

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Contact Info

Mailing Address:

Klondike Gold Rush National Historical Park
P.O. Box 517

Skagway, AK 99840


907 983-9200

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