Air Quality Index of Major Towns across Sikkim

The State Pollution Control Board Sikkim has been conducting ambient air quality monitoring under the National Ambient Air Monitoring Programme in eight stations in the state of Sikkim. As per the latest AQI monitoring conducted during the year 2023 (January to August), the ambient air quality in the state has been well within the permissible limits as per the provisions of the Air (Prevention and Control of Pollution) Act, 1981. While AQI for majority of the towns are under 'Good' category, three major towns i.e Rangpo, Singtam and Deorali (Gangtok) in East Sikkim have fallen under 'Satisfactory' category which may be attributed to the fact that these towns are located in proximity to the National Highway NH10 which is subjected to heavy movement to vehicles.

» See latest Weekly/ Monthly AQI details

 

SN	Name of Station	MONTHLY AQI FOR THE YEAR 2023 (January - August)
		Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1	Rangpo, East Sikkim	73	72	58	59	61	58	59	57
2	Singtam, East Sikkim	63	67	66	66	66	58	55	59
3	Deorali, East Sikkim	67	54	63	50	54	35	27	29
4	Ravangla, South Sikkim	23	25	25	24	19	23	23	22
5	Namchi, South Sikkim	32	36	34	33	36	34	33	34
6	Pelling, West Sikkim	31	40	34	39	35	25	16	19
7	Mangan, North Sikkim	33	37	43	44	46	47	46	38
8	Chungthang, North Sikkim	25	29	31	30	37	29	29	28

 

 

   

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» Latest Weekly/ Monthly AQI details

National AQI Category and its associated health impacts

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National Air Quality Monitoring Programme (NAMP)

To prevent, control and abate air pollution in the country, the Government of India enacted Central legislation called the Air (Prevention & Control of Pollution) Act, 1981 (referred to as the Air Act, 1981). Every polluting industry must obtain a consent from the State Pollution Control Board for the discharge of air pollut­ants in any form through chimney or otherwise. The State Board may lay down suitable conditions while giving consent to discharge air pollutants in the light of emis­sion standards developed by the Central Board, subsequently notified through the rules framed under the Environment (Ptrotection) Act, 1986 Rules.

The air quality surveillance and monitoring is under taken to detect any deterioration in air quality arising from industrial, vehicular, residential and natural sources of pollution, as there are large seasonal variation in the concentration of various air pollutants. Air quality monitoring is the measurement of various pollutants to study the pattern and movement of air masses and deterioration of air quality. Monitoring programme helps in estimating the dynamic concentration levels of various pollutants from time to time, based on dispersal mode of original concentration at sources and at receptor end.

With a number of industrial units in the state mostly the pharmaceuticals and ancillary units, SPCB Sikkim under the National Air Monitoring Programme (NAMP) has established nine (09) nos. of Air Quality Monitoring (AQM) stations in order to monitor the air quality in the state. The state of Sikkim has been declared as the Air Pollution Control Area under Gazette notification no. 506 dated 08/09/2011. The details of the monitoring stations are as under:

SN	Name of monitoring station	Latitude o N	Longitude o E
1.	RANGPO	27.1736	88.5305
2.	SINGTAM	27.5144	88.4969
3.	DEORALI	27.3183	88.6063
4.	RAVANGLA	27.3075	88.363
5.	NAMCHI	27.17	88.35
6.	PELLING	27.3028	88.2344
7.	CHUNGTHANG	27.6033	88.6469
8.	MANGAN	27.5025	88.5358

*The 9th station located at Tashi View point, Gangtok has been damaged due to landslide and currently not in operation.

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Weekly Ambient Air Quality Data (AQI and Average PM₁₀, SO₂, NO₂) across Sikkim State at 8 (Eight) stations.

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Industrial Ambient Air Quality of Sikkim

» Industrial Air Quality of Sikkim (2015-16)