Nadp.org

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The National Atmospheric Deposition Program (NADP) is a cooperative network of federal, state, university, and private sector partners that monitors the chemical composition of precipitation in the United States. NADP data are used to track changes in the chemistry of precipitation and to assess the impacts of acidic deposition, air pollution, and climate change on the environment.

NADP was founded in 1978 by the National Atmospheric and Oceanic Administration (NOAA) and the United States Geological Survey (USGS). The program has since been expanded to include over 250 monitoring sites in the United States and Canada. NADP data are used by researchers, policymakers, and the public to understand the causes and effects of acid rain and other forms of air pollution.

NADP data have shown that the chemistry of precipitation in the United States has improved significantly since the 1970s. This improvement is due in part to the Clean Air Act, which has reduced emissions of sulfur dioxide and nitrogen oxides from power plants and other sources. However, NADP data also show that precipitation in the United States remains acidic, and that some areas of the country are still experiencing high levels of air pollution.

NADP data are essential for understanding the impacts of air pollution on the environment. The program provides valuable information for researchers, policymakers, and the public, and helps to protect the environment and public health.

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