On Saturday at 2:34 p.m. the NWS Greenville-Spartanburg SC reported an air quality alert in effect until Sunday at 2:45 p.m.

The red-level air quality index (AQI) category—covering values from 151 to 200—means the air is unhealthy for everyone, not ...

On Wednesday at 3:35 p.m. an air quality alert was reported by the NWS Greenville-Spartanburg SC in effect until Thursday at ...

Public health warning issued for the Coachella Valley owing to dangerously high levels of airborne particle pollution from ...

An air quality alert was reported by the NWS San Diego CA on Thursday at 12:22 p.m. in effect until Saturday at midnight for ...

The National Weather Service reported an air quality alert at 1:30 p.m. on Thursday in effect until 2:30 p.m. The alert is for Columbus Area, Fremont Area, Omaha Area, Lincoln ...

The NWS San Diego CA reported an air quality alert at 11:08 a.m. on Wednesday in effect until Thursday at 8 p.m. for ...

The National Weather Service reported an air quality alert at 1:25 p.m. on Wednesday in effect until Friday at 7 a.m. The alert is for Columbus Area, Fremont Area, Omaha ...

On Thursday at 10:17 a.m. the National Weather Service reported an air quality alert in effect until Friday at 7 a.m. The alert is for Kearney Area and Grand Island ...

On Tuesday at 1:59 p.m. the National Weather Service reported an air quality alert in effect until Wednesday at 10 a.m. The alert is for Nance, Merrick, Polk, Hamilton, York, ...

The EPA's air quality forecast for Thursday shows a concentration of red-level AQI alerts centered on southern New Mexico and El Paso, Texas. Particulate matter, or PM2.5, is of particular concern.