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Clean Air Status and Trends Network (CASTNET)

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CASTNET is a national monitoring network established to assess trends in pollutant concentrations, atmospheric deposition, and ecological effects due to changes in air pollutant emissions.

Clean Air Status and Trends Network (CASTNET)

 

Monitoring

Download Data

Maps & Charts

Publications

What's New

CASTNET site locations, including latitude, longitude, and elevation values, have been updated to reflect site data collected as part of the independent audit program. Learn about the audit program and read the audit reports. For the updated site locations, download the data.

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