Air Quality Guidelines

Marin County Air Quality Outdoor Activity Overview and Communication Protocols for Schools (during COVID-19)

Check the air quality daily at www.airnow.gov

AQI Basics for Ozone and Particle Pollution
Daily AQI Color Levels of Concern Values of Index Description of Air Quality
GREEN Good 0 to 50 Air quality is satisfactory, and air pollution poses little or no risk.
YELLOW Moderate 51 to 100 Air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
ORANGE Unhealthy for Sensitive Groups 101 to 150 Members of sensitive groups may experience health effects. The general public is less likely to be affected.
RED Unhealthy 151 to 200 Some members of the general public may experience health effects; members of sensitive groups may experience more serious health effects.
PURPLE Very Unhealthy 201 to 300 Health alert: The risk of health effects is increased for everyone.
MAROON Hazardous 301 and higher Health warning of emergency conditions: everyone is more likely to be affected.

 

COM Air Quality Guidelines
Values of Index School in Session? Brief Activities (<15 min) Physical Education (< 1 hr) Athletic Practice and Training (2-4 hrs) Scheduled Sporting Events
Good
0 to 50		 YES

No Restrictions
Moderate
51 to 100		 YES

Ensure sensitive individuals are medically managing their condition*

Unhealthy for Sensitive Groups

101 to 150		 YES

Sensitive individuals should exercise indoors or avoid vigorous outdoor activities.*

Sensitive individuals should avoid vigorous outdoor activities.*

Reduce vigorous exercise to 30 min per hour of practice time with increased rest breaks and substitutions.

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.*

Unhealthy

151 to 200		 YES

Avoid vigorous outdoor activities. Sensitive individuals should remain indoors.*

Increase rest breaks and substitutions per CIF guidelines for extreme heat.

Ensure that sensitive individuals are medically managing their condition.*

Very Unhealthy

201 to 300

YES (<275)

NO (>275) Campuses closed at District's discretion

No outdoor activity. No indoor exercise or vigorous activity.

Event must be rescheduled or relocated.

Hazardous

301 and higher		 NO

No outdoor activity. No indoor exercise or vigorous activity.