The Arizona Department of Environmental Quality (ADEQ) has issued an Ozone High Pollution Advisory for Maricopa County, effective Friday, May 9, 2025. This advisory is due to expected ozone levels that may exceed the federal health standard.
Ground-level ozone forms when volatile organic chemicals (VOCs) and nitrous oxides (NOx) react in sunlight. These pollutants primarily originate from automobiles but also come from industries, power plants, and products like solvents and paints. The highest levels of ozone typically occur in the afternoon.
Those most affected by ozone include children, senior citizens, people who work or exercise outdoors, and individuals with pre-existing respiratory conditions. Health issues related to ozone exposure can include shortness of breath, coughing, wheezing, headaches, nausea, and throat and lung irritation.
The advisory includes restrictions such as prohibiting government employees and contractors from operating leaf blowers and restricting wood burning in residential fireplaces and outdoor fire pits. Employers are advised to activate their HPA Plans immediately. ADEQ recommends that the public limit outdoor activities during the advisory period.
ADEQ collaborates with the Maricopa County Air Quality Department (MCAQD) and Valley Metro to offer tips for reducing ozone pollution:
– Minimize driving; consider carpooling or using public transit.
– Refuel vehicles after dark.
– Avoid long drive-thru lines by parking cars and going inside.
– Use low-VOC or water-based paints.
– Ensure containers of household cleaners are sealed properly.
For more information on reducing air pollution, visit CleanAirMakeMore.com.
The Maricopa County Air Quality Department aims to ensure clean air standards are met for residents’ health. It offers resources on its website: CleanAirMakeMore.com.
Valley Metro provides eco-friendly public transit options across greater Phoenix and Maricopa County. More details can be found at Valleymetro.org.
