May marks the start of
ozone season in Southern
California. During this time,
heat, sunlight, and stagnant air can
increase the formation of ground-level
ozone, leading to unhealthy air quality,
especially in inland areas during
afternoon hours.
Ozone pollution can cause or worsen respiratory issues, including asthma, bronchitis, and lung inflammation. Children, older adults, pregnant people, and those with heart or lung conditions are most at risk, but poor air quality can affect everyone.
May is also National Clean Air Month, originally established in 1972 by the American Lung Association to raise awareness about how air quality impacts public health. Today, it serves as a reminder that small, everyday choices can make a meaningful difference.
Stay informed and take action:
• Check real-time air quality and sign up for alerts by downloading the South Coast AQMD mobile app
• Visit www.aqmd.gov/AQImap for current air quality conditions
• Walk, bike, carpool, or use public transit when possible, and avoid idling when driving
When air quality is unhealthy, limit prolonged outdoor activity, avoid peak afternoon hours, and move activities indoors when possible, especially for sensitive groups.
Summer can also bring additional challenges. Wildfires, dust storms, and Independence Day fireworks can increase particle pollution. Choosing cleaner alternatives, such as attending a drone show instead of using personal fireworks, can help reduce impacts in local communities.
Make checking air quality part of the daily routine with South Coast AQMD’s mobile app for real-time
conditions and alerts, and take simple steps to help keep the air clean.