Air Quality Numbers Explained: As pollution in Delhi continues to rise without pause, residents are constantly checking the AQI levels to decide when it might be safe to step outdoors. Air Quality ...

Parts of the Midstate have been under an air quality alert this week. The Pennsylvania Department of Environmental Protection issued a “code orange,” saying fine particle pollution was high in Dauphin ...

Air quality appears to have worsened in the Capital Region and Hudson Valley. Stagnant winter air trapping pollutants close to the ground is likely to blame.

This winter warm-up was an odd one because it came without much wind. It was nearly calm over the last day. Typically, a big winter warm-up is blown in on a strong southwest wind, which doesn’t allow ...

Air quality alerts in Pennsylvania are being extended, affecting central counties, including Dauphin, Cumberland, Lebanon, ...

People with heart or lung disease, old people, and children are being advised today, Feb. 18, to choose less strenuous activities — like walking instead of running — and to shorten the amount of time ...