Arizona has issued an Ozone High Pollution Advisory for Saturday, here's what it means

Phoenix, Arizona: The Arizona Department of Environmental Quality has issued an Ozone High Pollution Advisory (HPA) for Saturday, July 6.

What is an Ozone High Pollution Advisory (HPA)?

An Ozone High Pollution Advisory is a public health alert issued by environmental and health agencies to warn residents about high levels of ground-level ozone, a harmful air pollutant.

Ground-level ozone is created by chemical reactions between oxides of nitrogen (NOx) and volatile organic compounds (VOCs) in the presence of sunlight. This type of advisory is typically issued during periods of hot and sunny weather, when ozone levels are most likely to rise to unhealthy levels.

What health risks do high levels of ozone carry?

High levels of ozone can cause or exacerbate respiratory problems such as asthma, bronchitis, and other lung diseases. Children, the elderly, and individuals with pre-existing health conditions are particularly at risk. Common symptoms of ozone exposure include coughing, throat irritation, chest pain, and shortness of breath.

When and why are advisories issued?

Advisories are usually issued when ozone levels are forecasted to exceed the National Ambient Air Quality Standards (NAAQS) set by the Environmental Protection Agency (EPA). These advisories are often issued during the warmer months when sunlight and temperatures are high enough to facilitate the chemical reactions that produce ozone.

What can one do to mitigate the ill effects?

Residents are advised to limit strenuous outdoor activities, especially during peak afternoon hours when ozone levels are highest. People are encouraged to reduce activities that contribute to ozone formation, such as driving, using gas-powered lawn equipment, and industrial activities.