Air Quality Guidance

Posted Date: 09/09/26 (10:56 AM)

Dear AUSD Community,

Yesterday, we experienced our first smoky conditions of the season following a controlled burn on Angel Island. We want to take this opportunity to share the guidance we follow to help keep students and staff safe when air quality is poor.

AUSD keeps apprised of the Air Quality Index (AQI) and adjusts outdoor and physical activity as needed in accordance with the guidance we follow listed on the School Air Quality Activity Recommendations chart below. Additional information is available on the AUSD Air Quality webpage.

Activity	LEVEL 1AQI 0-50PM2.5 0-12 µg/m3	LEVEL 2AQI 51-100PM2.5 13-35 µg/m3	LEVEL 3AQI 101-150PM2.5 36-55 µg/m3	LEVEL 4AQI 151-200PM2.5 56-150 µg/m3	LEVEL 5AQI 201 or higherPM2.5 150+ µg/m3
Recess (15 min)	No restrictions	Ensure that sensitive individuals are medically managing their condition.*	Sensitive individuals should exercise indoors or avoid vigorous outdoor activities.*	Exercise indoors or avoid vigorous outdoor activities. Sensitive individuals should remain indoors.*	No outdoor activity. All activities should be moved indoors.
P.E. (1 hr)	No restrictions	Ensure that sensitive individuals are medically managing their condition.*	Sensitive individuals should exercise indoors or avoid vigorous outdoor activities.*	Exercise indoors or limit vigorous outdoor activities to a maximum of 15 minutes. Sensitive individuals should remain indoors.*	No outdoor activity. All activities should be moved indoors.
Athletic Practice & Training (2-4 hrs)	No restrictions	Ensure that sensitive individuals are medically managing their condition.*	Reduce vigorous exercise to 30 minutes per hour of practice time with increased rest breaks and substitutions. Ensure that sensitive individuals are medically managing their condition.*	Exercise indoors or reduce vigorous exercise to 30 minutes per practice time with increased rest breaks and substitutions. Sensitive individuals should remain indoors.*	No outdoor activity. All activities should be moved indoors.
Scheduled Sporting Events	No restrictions	Ensure that sensitive individuals are medically managing their condition.*	Increase rest breaks and substitutions per CIF guidelines for extreme heat.** Ensure that sensitive individuals are medically managing their condition.*	Increase rest breaks and substitutions per CIF guidelines for extreme heat.** Ensure that sensitive individuals are medically managing their condition.*	Event should be rescheduled or relocated.