(Air Quality Alert issued overnight)….It was issued at 1:00 am Friday morning.
It was for the Calexico area. The Ethel Street monitoring station recorded a 24 average of PM 2.5 at very high levels, for an air quality condition of Unhealthy for Sensitive Groups. Levels had lowered by 6:00 am, for a condition of Moderate. PM 2.5 is a finite particulate matter, created mostly from vehicle emissions. Morning air quality was also moderate in Brawley and Niland. Monitoring stations in both areas recorded slightly increased levels of PM 10, mostly dust in the air.