MARICOPA COUNTY: An Ozone High Pollution Advisory has been issued for Thursday, June 16

Ozone: Ground level ozone is formed by a chemical reaction that needs heat from sunlight, nitrogen oxides and VOCs to form. The months of April through September make up our Valley’s longer-than-normal "ozone season."

"High Pollution Advisory" or "HPA" means the highest concentration of pollution may exceed the federal health standard. Active children, adults and people with lung disease such as asthma should reduce prolonged or heavy outdoor exertion. Maricopa County employers enlisted in the Travel Reduction Program are asked to activate their HPA plans on high pollution advisory days.

The Arizona Department of Environmental Quality has issued an Ozone High Pollution Advisory for Thursday, June 16

 

In an effort to raise Maricopa County and metropolitan Phoenix air quality awareness and encourage behavior modification based on air quality conditions, Maricopa County Air Quality Department has initiated an Air Quality Awareness “Flag” Program to increase public and business community recognition of the Air Quality Index rating system. The intent is to highlight the need to take responsible measures to control air pollution during periods when Metropolitan Phoenix air quality is degraded.