Southwest Alaska Network
The Southwest Alaska Vital Signs Network (SWAN) consists of five NPS units, Alagnak Wild River, Aniakchak National Monument & Preserve (NM & Pres), Katmai National Park &Preserve (NP & Pres), Kenai Fjords NP, and Lake Clark NP & Pres and are designated as Class II air quality areas. Network parks encompass climatic conditions, geologic features, pristine ecosystems, natural biodiversity, freshwater, and marine resources equalled by few places in North America.
None of the Network parks have on-site ambient air quality monitoring. The U.S. Fish and Wildlife Service operates IMPROVE monitors near Lake Clark NP & Pres (to represent visibility conditions in the Tuxedni Wilderness) and near Simeonof Wilderness on the Alaska Peninsula about 100 km Southwest of Aniakchak NM & Pres.
The Network map below provides information on monitoring. Visibility is monitored as part of the Interagency Monitoring of Protected Visual Environments (IMPROVE). Additional details on this parameter are described in Air Quality Monitoring Because of the lack of monitoring sites, it was not possible to estimate air quality conditions for Southwest Alaska Network.
Air quality monitoring in or near the network is indicated on the map by symbols, with the blue line showing the approximate borders of the network. The legend shows the symbols for the type of monitoring present, with NPS park units in green.