Air Quality

Marin County Office of Education Air Quality Resource Page

Note: LCMSD will close doors and windows when AQI is equal to or greater than 150. Teachers will exercise their judgement on closing windows/doors between 100-150. 

In the event that the Air Quality Index (AQI) for the following day may exceed the Hazardous range (above 300) for the majority of the county, Public Health will make a recommendation by 4:00 pm (for the following day).