Concord air quality index

Good

Primary Pollutant：
O3

PM2.5 (Particulate matter less than 2.5 microns)
Good
3.28 µg/m3

CO (Carbon Monoxide)
Good
1 µg/m3

NO2 (Nitrogen Dioxide)
Good
6 µg/m3

O3 (Ozone)
Good
25 µg/m3

PM10 (Particulate matter less than 10 microns)
Good
3 µg/m3

SO2 (Sulphur Dioxide)
Good
1 µg/m3