Air quality today ranged from Code Yellow (moderate) levels to Code Purple (Very Unhealthy) levels (AirNow, top left). The Code Orange (Unsafe for Sensitive Groups), Code Red (Unhealthy), and Code Purple levels of PM 2.5 were mostly seen in the Pacific Southwest and the Rocky Mountain States. Code Yellow levels, however, were more widespread, appearing in the Pacific Southwest, the Mississippi Valley, the Plains States, and the Southeast. The PM 2.5 in the Plains States region was mostly due to smoke from wildfires in this area, as seen in NOAA's HMS, map, top right. Ozone levels in the Plains States, the Pacific Southwest, and the Rocky Mountain States reached Code Yellow levels, with some Code Red levels in California and Arizona (weather.gov, bottom left). The elevated levels of Ozone in these areas were most likely due to increased temperatures in this area, as seen in weather.gov's temperature map, bottom right. The temperatures in this area reached highs of nineties and hundreds, which most likely contributed to the high levels of ozone today.

PM 2.5 levels were mostly low today, with mostly Code Yellow (Moderate) levels of PM 2.5 being seen in the Mississippi Valley and the Great lakes region, along with some in the Pacific Southwestern area, as seen in AirNow's PM 2.5 map, top left. This PM 2.5 was somewhat affected by the smoke being spread from wildfires in the Mississippi Valley, as seen in NOAA's HMS map, top right. Ozone levels, however, were more widespread and of higher levels. Both Code Yellow and Code Orange (Unsafe for Sensitive Groups) levels were seen in the Mississippi Valley, the Great Lakes region, some of the Plains States, the Pacific Southwest, and the Rocky Mountain States (weather.gov, bottom left). The rise in Ozone is due to the increased temperature in the summer months, and will most likely continue to increase as the summer progresses and temperatures rise.

PM 2.5 levels were very low today, with only Code Yellow (Moderate) levels being seen in the southern Plains States and the Pacific Southwest, along with some in the Mississippi Valley (AirNow, top left). This small amount of PM 2.5 was somewhat due to light plumes of smoke in the South, as seen in NOAA's HMS map, top right. Ozone levels, however, were very widespread, and rose up to Code Orange (Unsafe for Sensitive Groups) levels. The Code Yellow levels were in the Pacific Southwest, the Rocky Mountain States, the Plains States, and the Great lakes region. The Code Orange was in the Great lakes region and the Pacific Southwest (AirNow, bottom left). These elevated levels of PM 2.5 were somewhat due to increased temperatures in this area, as shown in NOAA's temperature map, bottom right. The temperatures in this area had highs in the nineties and hundreds, which most likely contributed to ozone production in these areas.

PM 2.5 levels today stayed around Code Yellow (Moderate) levels today, with most of the PM concentrating around the Mississippi Valley, the Southeast, and California. (AirNow, top left). Some Code Orange (Unsafe for Sensitive Groups) was also located in the mid Plains States. This rise in PM 2.5 was most likely due to smoke from wildfires in the Southern Plains States and the Mississippi Valley, as shown in NOAA's HMS map, top right. One fire in the lower Plains States in the Mallard Fire, which spans over 47,000 acres and counting (InciWeb). The source of this fire is unknown. Some light plumes of smoke in the general Southeastern region could be seen mixed in with cloud coverage in NASA's MODIS Terra images, bottom left. Ozone levels were also around Code Yellow levels today, with Moderate levels of ozone spreading through the Rocky Mountain States, the Pacific Southwest, and the Great Lakes Region.

PM 2.5 levels today stayed at Code Yellow (Moderate) levels today, spreading across the Southern Plains States, the Mississippi Valley, the Great Lakes region, and the Mid-Atlantic, along with trace amounts in California (AirNow, top left). The rise in air quality along the East coast was most likely due to smoke from wildfires in the Southeast. The wildfires, along with the smoke from these fires, can be seen in NOAA's HMS map, top right. Light plumes of this smoke could be seen in NASA's MODIS Terra images over the Southeastern region. Ozone levels, much like the PM 2.5 levels, stayed around Code Yellow levels. Ozone was mostly spread around the East coast, the Northern Plains States, and the Pacific Southwest.

Air quality today mostly stayed in the Code Yellow (Moderate) levels today, with most of the PM 2.5 seen being located in the Great Lakes region, the Rocky Mountain states, and the Pacific Southwest (AirNow, top left). PM 2.5 levels did, however, rise to Code Red levels (Unsafe) on the border between Idaho and Montana, most likely due to wildfires and smoke in this area, as seen in NOAA,s HMS map, top right. Ozone levels were also relatively low, with only some Code Yellow and Code Orange (Unsafe for Sensitive Groups) being seen in the Pacific Southwest (weather.gov, bottom left). This rise in ozone was somewhat due to high temperatures in this area, with the temperatures rising to the high ninety degrees throughout the day (weather.gov, bottom right).

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.