(Air pollution along the border)…The Air Pollution Control District said high levels of PM 2.5 was the cause.
The 24-hour average of the finite particulate matter pushed the Air Quality Index in Calexico to a condition of Unhealthy for Sensitive groups at 10:00 pm Thursday. The APCD says the levels went up to an Unhealthy condition at 1:00 Friday morning. Sensitive groups include those with respiratory or heart disease, the elderly and children. It is recommended those in the at risk groups reduce out door activity, or possible stay in doors until the levels are reduced. PM 2.5 is mostly a result of vehicle emissions.