Southern Colorado Plateau Network
The Southern Colorado Plateau Vital Signs Network (SCPN) includes 19 national park units in Arizona, Colorado, New Mexico, and Arizona: Aztec Ruins National Monument (NM), Bandelier NM, Canyon de Chelly NM, Chaco Culture National Historic Park (NHP), El Malpais NM, El Morro NM, Glen Canyon National Recreation Area (NRA), Grand Canyon National Park (NP), Hubbell Trading Post National Historic Site (NHS), Mesa Verde NP, Navajo NM, Petrified Forest NP, Petroglyph NM, Rainbow Bridge NM, Salinas Pueblo Missions NM, Sunset Crater Volcano NM, Walnut Canyon NM, Wupatki NM, and Yucca House NM. Class I areas, which receive the highest protection under the Clean Air Act, include Bandelier NP (NP), Grand Canyon NP, Mesa Verde NP, and Petrified Forest NP. The remaining areas are Class II air quality areas and also receive protection under the Clean Air Act.
The Network map below provides information on air quality monitoring. Ozone, sulfur dioxide, dry deposition, and meteorology are collected by the Clean Air Status and Trends (CASTNet) and Gaseous Pollutant Monitoring (GPMN) networks. Ozone is also monitored with passive samplers and portable continuous analyzers. Wet Deposition is monitored through cooperation with National Atmospheric Deposition Program/National Trends Network (NADP/NTN). The Mercury Deposition Network (MDN), part of NADP, collects precipitation samples that are analyzed for mercury. Visibility is monitored as part of the Interagency Monitoring of Protected Visual Environments (IMPROVE). Additional details on these parameters are described in Air Quality Monitoring.
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. Class I areas have linkable access to ARIS information.