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Air Quality / Pollution
 
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Global NATIONAL AIR QUALITY MONITORING PROGRAMME (N.A.M.P.)
 
Parameter -wise findings are as follows.
SO2 (Sulphur dioxide)

The levels of sulphur dioxide are within the prescribed National Ambient Air Quality Standards. SO2 concentration has decreased over the years indicating that there has been a decline in SO2 levels. Decreasing trend may be due to various interventions that have taken place in recent years such as reduction in sulphur in diesel, use of cleaner fuel such as CNG in metro cities, change in domestic fuel from coal to LPG etc.

NO2 (Nitrogen dioxide)

The levels of nitrogen dioxide are within the prescribed National Ambient Air Quality Standards in most of the cities. NO2 concentration has remained stable over the years with a slight decrease in last three years despite increase in sources like vehicles. The reason for this may be various intervention measures that have taken place such as improvement in vehicle technology and other vehicular pollution control measures like alternate fuel etc.

PM10 (Particular Matter)

The levels of PM10 exceed the prescribed National Ambient Air Quality Standards in most of the cities. PM10 concentration shows fluctuating trend exceeding the NAAQS. The reasons being emission from gensets, small scale industries, biomass incineration, suspension of traffic dust, natural dust, commercial and domestic use of fuel and vehicular emission etc. Furthermore, the increasing trend for PM10 may be attributed to the increasing number of vehicles and re-suspension of natural dust.

Air Quality Status (annual) in 46 Million plus Cities