PM2.5 air quality conditions worsened today in the upper Midwest, with Code Orange (Unhealthy for Sensitive Groups) readings widespread across Minnesota, Wisconsin, Illinois, Indiana, and Ohio. Elsewhere in the nation, including the Northeast and West Coast, air quality was generally…

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Code Orange PM2.5 Air Quality in the Midwest

The air quality (AIRNow; top, left) in almost half the country was mostly in the moderate range. In the upper Midwest – Minnesota and Wisconsin – unhealthy levels (for sensitive groups) of PM2.5 were recorded in the morning and it…

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Air quality worsens in the US (Midwest/Central/South/Northeast)

The fires in Central/Southern US which have been reported here since last week are still showing signs of smoke over the Midwest states as can be seen in today’s MODIS Aqua images (top, left). Also in this picture we see…

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Smoke still visible over the Midwest

Today Oregon started the day experiencing poor air quality with levels of PM2.5 ranging from Moderate to Unhealthy but in the afternoon air quality came back to good conditions (top, left). Air quality also improved since yesterday in the Midwest…

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Air quality improves in the Midwest and South

Air quality in the US today was very similar to yesterday’s, with moderate levels of PM2.5 in California up to Southern Oregon, in the Midwest and also in the South in the morning. Peaks of unhealthy levels for sensitive groups…

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Moderate air quality in California and in the Midwest persists