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ISSUED ON: Tuesday, December 18, 2018

View the Phoenix Hourly Forecast >

These forecasts are based on the Environmental Protection Agency (EPA)'s AQI federal health standards and are issued for the following areas:

• Phoenix | View Forecast > 
• Tucson | View Forecast >
• Yuma | View Forecast >
• Nogales | View Forecast >

The AQI Forecast lets the public know expected air quality conditions and provides advice about what they can do to protect their health, especially that of children, seniors and people with respiratory problems.