In a move to safeguard public health amid rising ozone levels, the Pima County Department of Environmental Quality (PDEQ) has declared an Ozone Action Day for the Tucson metropolitan area. Elevated levels of ground-level ozone can pose a significant risk to sensitive individuals, potentially causing respiratory issues ranging from shortness of breath and coughing to more severe symptoms requiring medical attention. The PDEQ warning, issued on July 24th, advises those particularly vulnerable to limit strenuous outdoor activities between noon and sunset.
Groups identified as more susceptible to ozone's ill effects include children, active adults, people suffering from respiratory diseases, and others with a heightened sensitivity to this air pollutant. "Individuals who are especially sensitive to ozone air pollution may experience shortness of breath, coughing, throat irritation, wheezing, and breathing discomfort," the PDEQ cautioned in its announcement. The agency has explicitly recommended that such individuals reduce, to actively limit, their time spent outdoors during peak ozone hours.
Ground-level ozone pollution owes its existence to various emissions, including those from vehicles, power plants, and other industrial sources. It forms when oxides of nitrogen (NOx) and volatile organic compounds (VOCs), released from these sources, react under the influence of sunlight and heat. The PDEQ has been actively monitoring the situation across its network of 16 monitoring sites in the region, providing real-time pollution levels on its website.
Additionally, the PDEQ urges residents to engage in a series of actions aimed at reducing ozone production. These actions include driving less, utilizing public transport, biking, avoiding extended vehicle idling, refueling cars after dark, ensuring gas caps are tightly sealed, minimizing the use of gas-powered lawn equipment, and conserving electricity. Using paints and solvents that have low VOC emissions is also recommended as a measure to combat ozone formation. Those interested in staying informed on air quality advisories can sign up for alerts directly through the PDEQ's Clean Air Program initiative.
