The Air Quality Index (AQI) is a measure used to communicate how
polluted the air currently is or how polluted it is forecast to
become.
AQI is calculated based on the levels of five major air pollutants
regulated by the Clean Air Act: ground-level ozone, particulate
matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide.AQI is
expressed as a number from 0 to 500. The higher the AQI value, the
greater the level of air pollution and the greater the health concern.
Particulate Matter
(Tiny particles affecting lungs)
PM2.5 and PM10 are inhalable particles, with diameters that are
generally 2.5 micrometers and smaller, and 10 micrometers and smaller,
respectively.
Gaseous Pollutants
(Common air pollutants)
NO2, SO2, CO, and Ozone are common gaseous pollutants that can have
significant impacts on human health and the environment.
AQI Category (Range)
PM10 24-hr
PM2.5 24-hr
NO2 24-hr
O3 8-hr
CO 8-hr (mg/m3)
SO2 24-hr
NH3 24-hr
Pb 24-hr
Good (0-50)
0-50
0-30
0-40
0-50
0-1.0
0-40
0-200
0-0.5
Satisfactory (51-100)
51-100
31-60
41-80
51-100
1.1-2.0
41-80
201-400
0.6-1.0
Moderate (101-200)
101-250
61-90
81-180
101-168
2.1-10
81-380
401-800
1.1-2.0
Poor (201-300)
251-350
91-120
181-280
169-208
10.1-17
801-1600
801-1200
2.1-3.0
Very Poor (301-400)
351-430
121-250
281-400
209-748*
17-34
801-1600
1200-1800
3.1-3.5
Severe (401-500)
430+
250+
400+
748+*
34+
1600+
1800+
3.5+
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Real time AQI and Maps
City :
City Name
AQI Value Range:
Description:
Pollutants :
Awareness and Tips
Reduce Indoor Pollution
Use air purifiers and keep your home well-ventilated.
Wear a Mask
Use N95 masks when air quality is poor.
Stay Informed
Check AQI regularly and avoid outdoor activities when AQI is high.
Plant Trees
Contribute to improving air quality by planting trees.
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