PM 2.5 levels were mostly good today, except for in the Pacific Southwest region (AirNow, top left). PM 2.5 levels ranged from Code Yellow (Moderate) levels to Code Red (Unsafe) levels in this region, most likely because of smoke that spread from wildfires in the southern Plains States and Mexico. The layout of the smoke can be seen in NOAA's HMS map, top right. This smoke was also captured in NASA's MODIS Terra images, bottom left. In this image, light plumes of smoke could be seen mixed in with some cloud coverage. Ozone levels were more widespread, with Code Yellow levels appearing in the Plains States, the Rocky Mountain States, and the Pacific Southwest.

Air quality levels were not very good today, as PM 2.5 levels rose to Code Purple (Very Unhealthy) levels in the Pacific Southwest, along with Code Orange and Code Yellow (Unsafe for Sensitive Groups, Moderate, respectively), (AirNow, top left). There was also a good amount of Code Yellow seen in the Plains States, the Mississippi Valley, the Mid-Atlantic, and the Northeast. This elevated PM 2.5 was due to smoke in these areas from wildfires. A map of the smoke coverage can be seen in the NOAA's smoke map, top right. The smoke was also captured in NASA's MODIS Terra images, bottom left. Ozone levels were also somewhat bad, as there was widespread Code Yellow ozone across the nation, as seen in AirNow's ozone map, bottom right.

PM 2.5 levels were low again today, with only some Code Yellow (Moderate) levels being seen in the Plains States and the Pacific Southwest (AirNow, top left). This low amount of PM 2.5 was despite some small amounts of smoke along the eastern seaboard. There was also some smoke in the Plains States, which may have affected PM 2.5 levels in this area (NOAA, top right). This smoke was somewhat captured in NASA's MODIS Terra images, bottom left. Ozone levels were also mostly low, with Code Yellow levels being seen in the Pacific Southwest, the Great Lakes region, and the Southeast.

PM 2.5 levels stayed around Code Yellow (Moderate) levels in the Mid-Atlantic and the Great Lakes Region (AirNow, top left). There were very low levels of smoke today, with only some light plumes of smoke appearing in the mid Plains States and the Southeast, so the smoke may have slightly affected the PM 2.5 levels in this area (NOAA, top right). Some light plumes of smoke can be seen in NASA's MODIS Terra images, bottom left. Ozone levels were very low as well, with only some small amount of Code Yellow appearing in the Rocky Mountain States and California.

PM 2.5 levels were somewhat high today, with small amounts of Code Red (Unsafe) being seen in the mid Plains States, along with some Code Orange (Unsafe for Sensitive Groups) in the same areas (Airnow, top left). This rise in PM 2.5 was most likely due to a large amount of wildfires in this area, and a large amount of smoke as a result (NOAA, top right). Some of the smoke in the Southeast could be seen amongst some cloud coverage in NASA's MODIS Terra images, bottom left. Ozone levels were mostly low, with some Code Yellow appearing in the Plains States and the Great lakes region (AirNow, bottom right).

Air quality mostly stayed in Code Yellow (Moderate) levels of PM 2.5 today, with a large amount of Code Yellow appearing in the Plains States, the Mississippi Valley, parts of the Rocky Mountain states, and the Southeast(AirNow, top left). There was also some Code Orange (Unhealthy for Sensitive Groups) seen in the mid Plains States, as well as in California. This elevated PM 2.5 was most likely due to smoke from wildfires in this area, with light plumes of smoke spreading across the Plains States and the Mississippi Valley, NOAA, top right. Ozone levels were much lower, with only small amounts of Code Yellow seen in the mid Plains states and the Southeast (weather.gov, bottom left). The lower levels of ozone were most likely to low temperatures in most of the nation, as seen in weather.gov's temperature map, bottom right.

Air quality today mostly stayed in the Code Yellow (Moderate) range of PM 2.5, with some Code Orange (Unsafe for Sensitive Groups) appearing on the border between Montana and Canada. The rest of the Code Yellow was concentrated in the southern Plains States, the Mississippi Valley, the Southeast, and southern California (AirNow, top left). The elevated PM 2.5 was mostly due to smoke from wildfires in the Southeast, which can be seen in NOAA's HMS map, top right. The smoke in this area could not really be seen, as most of the smoke was made of light plumes (NASA MODIS Terra, bottom left.) .