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PM2.5 Hourly Data - Monthly Graphs

This web page provides the most recent monthly hourly fine particulate matter (PM2.5) concentrations obtained at the Presque Isle monitoring site. This data has not been quality assured and is subject to change. This information is updated hourly.
 
Monthly Graphs:

Hourly PM2.5 concentrations last updated Wednesday August 20, 2008 at 11:00 EST.

August 2008 - PM2.5 Hourly

 
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