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Ozone and Particulate Matter (PM2.5) Daily High Readings
HCDOES' seven ozone monitors and five continuous PM2.5 monitors measure concentrations of these pollutants throughout Southwest Ohio. The following spreadsheets provide each day's high reading recorded at each monitoring site. The ozone monitors measure the 1-hour concentration and the 8-hour concentration (the concentration over an 8-hour period). The PM2.5 monitors measure the 24-hour average concentration of particulate matter. The data points listed in the spreadsheets are the highest readings the monitors logged each day. For more information on the 1-hour and 8-hour ozone standards and the 24-hour PM2.5 average, please visit the U.S. EPA's National Ambient Air Quality Standards website. To view the data, please click on the highlighted months below: |
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