The Code Orange (Unhealthy for Sensitive Groups) PM2.5 air quality that was prevalent across the northern Mid-Atlantic region and parts of the Ohio River Valley on Monday continued today, as shown by the loops of preliminary PM2.5 AQI values below…

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Code Orange PM2.5 Air Quality Continues in the Northern Mid-Atlantic and Parts of the Ohio River Valley

There were widespread readings of Code Yellow (Moderate) air quality across the much of the eastern portion of the nation today, as seen in the loops of PM2.5 (below on left) and ozone (below on right) AQI values. PM2.5 conditions…

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Moderate Air Quality in Eastern U.S. and Southern California; Atlantic Hurricane Season Begins

Air quality was mostly Code Green (Good) today, with some scattered areas of Code Yellow (Moderate) conditions in the Midwest and southern California, as seen in the loops of AQI values for PM2.5 and ozone (below). The big weather-makers in…

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Moderate Air Quality in California and the Midwest; Smoke in Mexico

Today’s air quality was very similar to yesterday’s, as seen in the loops of PM2.5 and ozone AQI values (below). Conditions persisted in the Code Green (Good) range, except for a few areas of Code Yellow (Moderate) PM2.5 in the…

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Mostly Good Air Quality; Stationary Front and Rain Persist in Eastern U.S.