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Ozone High Pollution Advisory Issued for Phoenix Due to Ample Sunshine and Minimal Wind

Ozone High Pollution Advisory Issued for Phoenix Due to Ample Sunshine and Minimal Wind

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Today in Phoenix, air quality is under special attention due to an Ozone High Pollution Advisory issued by the Arizona Department of Environmental Quality for the period from Friday, May 9 through Sunday, May 11. This advisory indicates that ozone levels are expected to exceed the federal health standard, mainly because of ample sunshine and minimal wind, which allow ozone to accumulate throughout the day.

For Sunday, the Air Quality Index for ozone is forecast at 101, which falls into the Unhealthy for Sensitive Groups category. This means that active children, older adults, individuals with respiratory conditions, and those who spend considerable time outdoors may experience health effects like shortness of breath, coughing, wheezing, and throat irritation. Even healthy individuals could begin to notice mild respiratory discomfort if exerting themselves outdoors during the afternoon, when ozone levels typically peak[1][2][4].

Particulate matter levels—both PM10 and PM2.5—are forecast to remain moderate, with AQI values of 56 and 57, respectively. While these are not at unhealthy levels for the general public, people with pre-existing respiratory issues should still exercise caution[2].

Residents are encouraged to limit driving, carpool, or use public transit to help reduce ozone-forming emissions. It’s also wise to avoid outdoor exercise in the afternoon and keep windows closed during times of high ozone. Employers participating in clean air programs have been asked to activate their pollution reduction plans immediately[1].

Ozone forms when sunlight reacts with pollutants from vehicles, industries, and certain products like paints and solvents. With Phoenix’s forecasted high temperatures nearing 38 degrees Celsius today, conditions are set for continued ozone accumulation. The advisory and air quality forecast urge residents, especially those in vulnerable groups, to take extra steps to protect their health while minimizing activities that contribute to air pollution[1][2].

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