Nevada City - No Smoke - But headaches/tight chest and cough - is there invisible pollutants past few days? Sensors do not pick up all air quality?

Husband and I and neighbor agree - there is something in the air giving us headaches - tight chest (no we are not sick)

PurpleAir sensors can only detect particulate matter. Ozone is another common pollutant, especially in urban areas. Check with your local air quality agency (or AirNow) and see if ozone is high.