ECOWITT WH45 - Page 16

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Air Quality Index (AQI) for the PM10 Concentration
(24hr)
Carbon Dioxide Levels and potential health problems are
indicated below:
 250-350 ppm: background (normal) outdoor air
level
 350-1,000 ppm: typical level found in occupied
spaces with good air exchange
AQI
Air Pollution Level
PM2.5 Concentration
ug/m3
0 - 50
Good
0-54
51 -100
Moderate
55-154
101-150
Poor
155-254
151-200
Unhealthy
255-354
201-300
Severe
355-424
300+
Hazardous
425+