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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 monitoring conducted during the 1st week of April, 2021, 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.

 

SN LOCATION
AIR QUALITY INDEX
NAME OF STATION
30.03.2021
01.04.2021
06.04.2021
08.04.2021
1 Rangpo, East Sikkim 95
(Satisfactory)
87
(Satisfactory)
84
(Satisfactory)
93
(Satisfactory)
2 Singtam, East Sikkim 52
(Good)
53
(Good)
54
(Good)
52
(Good)
3 Deorali (Gangtok), East Sikkim 64
(Satisfactory)
66
(Satisfactory)
71
(Satisfactory)
56
(Satisfactory)
4 Ravangla, South Sikkim 29
(Good)
28
(Good)
28
(Good)
26
(Good)
5 Namchi, South Sikkim 34
(Good)
28
(Good)
32
(Good)
27
(Good)
6 Pelling, West Sikkim 35
(Good)
31
(Good)
33
(Good)
31
(Good)
7 Mangan, North Sikkim 15
(Good)
26
(Good)
26
(Good)
26
(Good)
8 Chungthang, North Sikkim 29
(Good)
32
(Good)
24
(Good)
34
(Good)

 


National AQI Category and its associated health impacts
AQI-Standards

As per the comparative analysis of the data generated for the average air quality index of 2020 (Jan-Dec), the state is well within the permissible limits and improvement has been observed during the lockdown. The restriction in vehicular movement and construction activities is likely to have contributed to the decrease in air pollution levels in the 1st and 2nd phase of the lockdown. During the 3rd phase of lockdown in which vehicular movement was allowed along with transportation of construction material the air pollution levels has shown a slight increase although the values are within the permissible limits.


AQI Graph




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.



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

» Ambient Air Quality Data for March 30th and April 1st week 2021 new

» Ambient Air Quality Data for February (3rd and 4th week) 2021 new

» Ambient Air Quality Data for February (1st and 2nd week) 2021

» Ambient Air Quality Data for January (3rd and 4th week) 2021

» Ambient Air Quality Data for January (1st and 2nd week) 2021

» Ambient Air Quality Data for period December 2020

» Ambient Air Quality Data for period November 2020 (during Deepawali)

» Ambient Air Quality Data for period October, 2020

» Ambient Air Quality Data for period September, 2020

» Ambient Air Quality Data for period June (1st week), 2020

» AQI during Lockdown (May 25 - June 10, 2020) in Sikkim

» Ambient Air Quality Data for period April (4th week), 2020  

» Ambient Air Quality Data for period April (3rd week), 2020  

» Ambient Air Quality Data for period February (4th week), 2020  

» Ambient Air Quality Data for period February (3rd week), 2020  

» Ambient Air Quality Data for period February (2nd week), 2020  

» Ambient Air Quality Data for period February (1st week), 2020  

» Ambient Air Quality Data for period January (4th week), 2020  

» Ambient Air Quality Data for period January (1st week), 2020  

» Ambient Air Quality Data for period December (3rd and 4th), 2019

» Ambient Air Quality Data for period December (2nd week), 2019

» Ambient Air Quality Data for period December (1st week), 2019  

» Ambient Air Quality Data for period November (4th week), 2019  

» Ambient Air Quality Data for period November (3rd week), 2019  

» Ambient Air Quality Data for period October 25-31, 2019  

» Ambient Air Quality Data for period October 21 to November 4, 2019  (Gangtok)  

» Ambient Air Quality Data for period September (3rd and 4th week), 2019  

» Ambient Air Quality Data for period September (1st and 2nd week), 2019  

» Ambient Air Quality Data for period July (4th week), 2019  

» Ambient Air Quality Data for period July (3rd week), 2019  

» Ambient Air Quality Data for period June (4th week) till July (2nd week), 2019  

» Ambient Air Quality Data for period May (4th week), 2019  

» Ambient Air Quality Data for period April (3rd week), 2019  

» Ambient Air Quality Data for period April (1st and 2nd week), 2019  

» Ambient Air Quality Data for period March (4th week), 2019  

» Ambient Air Quality Data for period March (3rd week), 2019  

» Ambient Air Quality Data for period March (2nd week), 2019  

» Ambient Air Quality Data for period March (1st week), 2019  

» Ambient Air Quality Data for period February (4th week), 2019  

» Ambient Air Quality Data for period February (3rd week), 2019  

» Ambient Air Quality Data for period February (2nd week), 2019  

» Ambient Air Quality Data for period February (1st week), 2019  

» Ambient Air Quality Data for period January (4th week), 2019  

» Ambient Air Quality Data for period January (3rd week), 2019  

» Ambient Air Quality Data for period January (2nd week), 2019  

» Ambient Air Quality Data for period January (1st week), 2019  

» Ambient Air Quality Data for period December (1st week), 2018  

» Ambient Air Quality Data for period November (3rd week), 2018  

» Ambient Air Quality Data for period June 19 & 21, 2018  

» Ambient Air Quality Data for period June 14 & 16, 2018  

» Ambient Air Quality Data for period April 17 & 19, 2018  

» Ambient Air Quality Data for period April 10 & 12, 2018  

» Ambient Air Quality Data for period April 3 & 5, 2018  

» Ambient Air Quality Data for period March 27 & 29, 2018  

» Ambient Air Quality Data for period March 21 & 23, 2018 

» Ambient Air Quality Data for period February 20 & 22, 2018  

» Ambient Air Quality Data for period January 31 & February 01, 2018  

» Ambient Air Quality Data for period January 23 & January 25, 2018

» Ambient Air Quality Data for period January 16 & January 18, 2018

» Ambient Air Quality Data for period January 9 & January 11, 2018

» Ambient Air Quality Data for period January 2 & January 4, 2018

» Ambient Air Quality Data for period December 26 & December 29, 2017

» Ambient Air Quality Data for period December 2 & December 5, 2017

» Ambient Air Quality Data for period November 28 & November 30, 2017

» Ambient Air Quality Data for period November 21 & November 23, 2017

» Ambient Air Quality Data for period November 07 & November 9, 2017

» Ambient Air Quality Data for period October 31 & November 2, 2017



Industrial Ambient Air Quality of Sikkim

» Industrial Air Quality of Sikkim (2015-16)