Northeast Temperate Network
The Northeast Temperate Vital Signs Network (NETN) consists of eleven NPS units in the Northeast U.S. The parks include cultural, historical and natural areas. Acadia National Park (NP) is designated a Class I air quality area; the other ten units are Class II areas.
With the exception of Acadia NP and Saratoga National Historical Park, the Network parks have no on-site ambient air quality monitoring; however, in most cases, there are nearby monitors. The air pollutants of significant interest for the NETN are ozone and acidic deposition. At Acadia NP, visibility impairment and mercury deposition are also of concern. Seven of the parks, plus parts of the Appalachian National Scenic Trail (NST), are in designated ozone nonattainment areas. An ozone injury risk assessment indicates the risk of injury is moderate to high in seven of the NETN parks, plus along a significant section of the Appalachian NST.
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. The Class I area has linkable access to ARIS information.