This data set gives the daily maximum ozone concentrations (in ppb) observed at a subset of 23 Clean Air Status and Trends Network (CASTNET) monitoring sites on August 10, 2004.
A file in CSV format containing 23 records.
Hourly ozone data at CASTNET sites can be obtained from EPA's Clean Air Status and Trends Network program at http://www.epa.gov/castnet. Thanks to Steven Howard for his help collating and summarizing these hourly data.
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