Air quality

Index

NO2 (µg∙m−3)

SO2 (µg∙m−3)

Good

0 - 50

0 - 100

0 - 80

Regular

51 - 100

100 - 320

80 - 365

Inadequate

101 - 199

320 - 1130

365 - 800

Bad

200 - 299

1130 - 2260

800 - 1600

Too bad

>299

>2260

>1600