Arizona Air Quality Information
Published on: 04/10/2019 at 9:00 AM by M. Graves
First time PM10 (dust) exceeds health standard in 2019
Then, in the early morning hours on Wednesday the 10th, widespread dust entered Arizona's central deserts from the west, causing all PM10 monitoring sites around the Valley to see elevated PM10 levels. A haze was even evident around the Valley during the time of the morning commute. Winds quickly picked up again and helped to clear out the Valley's air temporarily. But gusty winds out of the west throughout the rest of the morning and afternoon resulted in additional dust in the Valley. A PM10 High Pollution Advisory was issued in the morning for the day, since PM10 was expected to exceed the heath standard again.