PHX Reporter

The Arizona Department of Environmental Quality (ADEQ) has issued an Ozone High Pollution Advisory (HPA) for Maricopa County, effective Friday, July 12, 2024. This advisory is due to anticipated ozone levels that are expected to exceed the federal health standard.

Ground-level ozone forms when emissions from vehicles, gasoline and diesel equipment, industrial and chemical processes, and other everyday activities react with sunlight. This type of pollution is more prevalent during the spring and summer months.

All county residents can be affected by ground-level ozone pollution, which poses risks to lung health and can trigger asthma. Children are particularly vulnerable because their lungs are still developing, they are often active outdoors, and they have a higher likelihood of having asthma. Adults with respiratory conditions and older adults are also sensitive to ozone. The public is advised to limit outdoor activities while the HPA is in effect.

ADEQ and the Maricopa County Air Quality Department (MCAQD) recommend several measures for residents and businesses to reduce ozone pollution:

- Promote remote work to reduce traffic.

- Carpool or use public transportation.

- Avoid long drive-thru lines; park your car instead.

- Use bicycles or walk for commutes.

- Sweep instead of using leaf blowers.

- Refuel vehicles after dark or during cooler evening hours.

- Use low-VOC or water-based paints and delay painting projects until advisories have passed.

- Ensure household cleaners and chemicals are sealed properly.

For more information on reducing air pollution, visit Maricopa.gov/AQ.

The advisory includes specific restrictions:

- Prohibition of wood burning in residential fireplaces, chimeneas, outdoor fire pits, etc., including those with burn permits.

- Government employees and contractors cannot operate leaf blowers; residents are encouraged to avoid using them as well.

- Off-road vehicle use should be avoided.

Background:

A High Pollution Advisory notifies the public when air pollutant levels are expected to exceed federal health standards. Ground-level ozone is formed through a chemical reaction involving sunlight, nitrogen oxides (NOx), and volatile organic compounds (VOCs).

Media Contact:

Ari Halpert

602-501-1266 cell

602-506-6713 desk

ari.halpert@maricopa.gov

About Maricopa County Air Quality Department:

MCAQD aims to improve air quality in Maricopa County so that residents can live in a healthy environment. Governed by the Maricopa County Board of Supervisors, MCAQD adheres to standards set by the federal Clean Air Act. For more information on air quality resources, visit Maricopa.gov/AQ.

Follow MCAQD on Instagram (@maricopaair), Twitter (@maricopaair), Facebook (@maricopaair), or download the Clean Air app available on iOS and Android platforms.