Gulf Coast Network
The Gulf Coast Vital Signs Network (GULN) consists of eight NPS units in the Florida Panhandle, Alabama, Tennessee, Mississippi, Louisiana, and Texas. The parks include cultural, historical, and natural areas. All of the units are designated Class II air quality areas.
None of the Network parks have on-site ambient air quality monitoring, but in many cases, there are nearby monitors. Deposition of air toxics is of significant concern to Network parks. Parts of three of the Network parks are in proposed 8-hour ozone non-attainment areas. An ozone injury risk assessment indicates the risk of injury is moderate to high in four of the GULN parks.
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) network. 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.