FOR IMMEDIATE RELEASE | High Pollution Advisory issued for Ozone effective Aug. 5, 2021, in the Phoenix area

Another day and another danger and risk to public health.

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"As for air quality, the current calm conditions and strong high pressure have lead to exceeding ozone levels. There is also regional smoke over a plentiful amount of states. This smoke is staying elevated but can also assist in increasing our ozone levels. We have extended our High Pollution Advisory into tomorrow and still have the High Pollution Watch in place for Friday, Saturday, and now Sunday as well.

NOTICE THE CHANGE:

HIGH POLLUTION ADVISORY is a forecast.

HIGH POLLUTION WATCH is a potential

High Pollution Advisory (HPA) | Notifies the public that the level of an air pollutant is forecast to exceed the federal health standard FOR CLEAN AIR

High Pollution Watch (HPW) | Notifies the public when there is potential for a pollutant to exceed the federal health standard FOR CLEAN AIR

Under the Environmental Quality Act of 1986, the Arizona State Legislature established the Arizona Department of Environmental Quality in 1987 as the state agency for protecting and enhancing public health and the environment of Arizona.

 

Even though there are slight chances for storms/rain on Sunday, afternoon hours are still expected to be sunny where ozone can quickly ramp up. As for particulates, PM₁₀ (dust) and PM_2.5 (smoke) are being primarily driven by localized activity and stagnate conditions. Both are forecast to stay in the Good Air Quality Index range through Sunday.

Air Quality Hourly Forecast | Phoenix

Updated On: 8/4/2021 - 8:49 AM

Click on each day to view forecast.

Wednesday Forecast:

Alert: Ozone High Pollution Advisory in effect for Wednesday

 

The Arizona Department of Environmental Quality (ADEQ) is issuing a High Pollution Advisory (HPA) for ozone effective Aug. 5, 2021, in the Phoenix area. ADEQ recommends that people limit outdoor activity while the HPA is in effect, especially children and adults with respiratory problems. Ground-level ozone forms when two types of pollutants — volatile organic compounds (VOCs) and nitrogen oxides (NOx) — react in sunlight. These pollutants come primarily from automobiles, but also from other sources, including industries, power plants and products, such as solvents and paints. Generally, the highest levels of ozone occur in the afternoon.