PurpleAir.com recently added an MVMCC sensor reading to their map:

https://www.purpleair.com/map?opt=1/mAQI/a10/cC5#14.17/38.04173/-122.52629

Wunderground: Novato air quality and pollen count:

wunderground.com/health/us/ca/novato/94945

AirNow: Novato/San Rafael reporting area:

airnow.gov/?city=Novato&state=CA&country=USA

Fire.ca.gov: for Ca Fire Information:  

fire.ca.gov/daily-wildfire-report/