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Air Quality Related Values (AQRV) Summaries
View graphical summaries and reports of the status and trends of air-quality-related values (AQRVs) and other metrics in National Parks and other federal lands.
Vistas in national parks and wilderness areas are diminished by haze that causes discoloration, loss of texture, and diminished visual range. Visibility in Class I areas is Protected and regulated by the Regional Haze Rule. These reports summarize vibility data from the IMPROVE network.
Elevated ozone levels adversely affect human health and plants in sensitive ecosystems. Ozone concentrations are regulated by the primary and secondary National Ambient Air Quality Standards (NAAQS). This report summarizes ozone trends as measured by the EPA ozone monitoring network.
Fine Particulate Matter (PM2.5)
Elevated amounts of PM2.5 adversely affect human health, visibility, and fine particulate deposition can contribute to ecosystem effects. PM2.5 levels are regulated by the National Ambient Air Quality Standards (NAAQS).
Deposition of sulfur and nitrogen compounds contributes to the acidification and eutrophication of sensitive terrestrial and aquatic ecosystems. This report summarizes trends in wet deposition data from the NADP National Trends Network (NTN).
This report summarizes the composition of dry deposition data from the Clean Air Status and Trends Network (CASTNet).
Mercury can bio-accumulate in fish, insects, and mammals. Human consumption of fish can cause adverse health effects.
Various updates and fixes were published to the FED website
The NPS W126 Ozone Metrics dataset was updated through 2012.
The IMPROVE Nephelometer dataset was updated through 6/30/2013.
The NADP National Trends Network (NTN) - Precipitation-Weighted Means dataset was updated through 2012.