Primary air pollutant in the Altadena area:

OZONE - 101 Unhealthy for Sensitive Groups

People with heart or lung disease, older adults, children and teens – take any of these steps to reduce your exposure:

• Choose less strenuous activities (like walking instead of running) so you don’t breathe as hard.
• Shorten the amount of time you are active outdoors.
• Be active outdoors when air quality is better.
• Everyone else: Enjoy your outdoor activities.