February 1, 2005
High PM levels in Midwest and Northeast
Just when all those cloudy hazefree skies that make the Smog Blog so dull seemed like they'd never end, along comes a day of intense winter haze in the midwest and east. The EPA AirNow site reported high PM2.5 concentrations.
As an example, PM2.5 concentrations were 60 ug/m3 in the Detroit area, 55 ug/m3 in Indianapolis, and 30 ug/m3 in Newark. Webcams (hazecam.net and mwhazecam.net) provided hazy photos of Indianapolis and Newark, respectively. Compare to a clear day in Indianapolis and a clear day in Newark.
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