Impact Of Covid-19 Lockdown On Air Quality Index Of Brass City Of India

IJEP 41(11): 1263-1267 : Vol. 41 Issue. 11 (November 2021)

Charu Gangwar1,2*, Atul Kumar1,2, Priyanka Singh1, Bhopal Singh1 and Anamika Tripathi1

1. Hindu College, Pollution Ecology Research Laboratory, Department of Botany, Moradabad – 244 001, UP, India
2. IFTM University, School of Science, Moradabad – 244 002, UP, India


Covid-19 is probably a serious respiratory infection caused by severe acute respiratory syndrome coronavirus 2. It was first identified in Wuhan, China in December 2019. To curb the spread of Covid-19, the Government of India ordered a nationwide lockdown for 21 days on 24 March 2020. The present study was conducted to find out the effect of lockdown on air quality of brass city of India, that is Moradabad. Therefore, air quality trends have been studied during the pre-lockdown and lockdown phase at the residential site, that is PTC. For the air quality assessment (AQI), concentration of three different parameters, that is PM10, NO2 and SO2 were calculated. It was observed that AQI was falling under satisfactory and moderate categories during the lockdown period as compared to the pre-lockdown period because all transport services with the exception of essential services, industrial establishments and hospitality services, etc., were suspended during the lockdown period which is a major contributor of air pollution. Therefore, the study revealed that the government’s decision to put the nation under lockdown to control the spread of the Covid-19 pandemic has resulted in significant improvement in the air quality of Moradabad.


Covid-19, Lockdown, Air quality index, Air quality improvement, Industrial city Moradabad


  1. BMJ Best Practice. 2020. Corona virus disease 2019 (Covid-19): The right clinical information, right where it’s needed. Basic.
  2. WHO. 2020. Novel coronavirus outbreak in China– What does it mean for Europe? International Health Regulation. World Health Organization, Geneva.
  3. Clarendon Medical Centre. 2020. Coronavirus (Covid-19) primary care. Available at : https://www.claren donmedicalcentre. com/2020/02/20/coronavirus-primary-care-covid-19.
  4. CPCB. 2020a. Impact of lockdown (25th March to 15th April) on air quality. Central Pollution Control Board, Ministry of Environment, Forest and Climate Change, Govt. of India, New Delhi.
  5. Gettleman, J. and K. Schultz. 2020. Modi orders 3-week total lockdown for all 1.3 billion Indians. The New York Times.
  6. Anonymous. 2020. Coronavirus as it happened: Merkel warns that easing restrictions too fast would be a ‘mistake’. Deutsche Welle, Germany
  7. Rangrass, M. and D. Singh. 2020. Impact of Covid-19 and the lockdown on air pollution in national capital region. Swaniti Initiative. 1-11.
  8. Koundal, A. 2020. Covid-19 lockdown: Air quality in india’s major industrial cities improve by upto 60% compared to last year. ET Energy World. Available at :
  9. EPA. 2014. Air quality index: A guide to air quality and your health (EPA-456/F-14-002). U.S. Environmental Protection Agency.
  10. Guttikunda, S. K., R. Goel and P. Pant. 2014. Nature of air pollution, emission sources and management in the indian cities. Atmos. Env., 95: 501-510.
  11. Chauhan, A., et al. 2019. Assessment of air pollutants at selected monitoring stations of Moradabad. Indian J. Env. Prot., 39 (3): 219-225.
  12. Gangwar, C., et al. 2019. Assessment of air pollution by illegal e-waste burning to evaluate the human health risk. Env. Int., 125: 191-199.
  13. CPCB. 2013. Guidelines for the measurement of ambient air pollutants (vol I). National Ambient Air Quality Series: NAAQMS /36/2012-13. Central Pollution Control Board, New Delhi.
  14. Jacob, M.B. and J.B. Hochheiser. 1958. Continuous sampling and ultra-micro determination of nitrogen dioxide in air. J. Anal. Chem., 30: 426–428.
  15. West, P. W. and G. C. Gaeke. 1956. Fixation of sulphur dioxide as sulphitomurcurate (II) and subsequent colourimetric determination. J. Anal. Chem., 28: 1816-1819.
  16. Watts, J. and N. Kommenda. 2020. Coronavirus pandemic leading to huge drop in air pollution. The Guardian. Available at : 20quality%20-%20 STANDARD%20COMPR-ESSION. pdf.
  17. Shrestha, A. M., et al. 2020. Lockdown caused by Covid-19 pandemic reduces air pollution in cities worldwide. EarthArXiv. DOI:10.31223/
  18. He, G., Y. Pan and T. Tanaka. 2020. Covid-19, city lockdowns and air pollution: Evidence from China. MedRxiv. DOI: 10.1101/2020.03. 29.2004 6649.
  19. Liu, F., et al. 2020. Abrupt declines in tropospheric nitrogen dioxide over China after the outbreak of Covid-19. Available at : 06542.
  20. Jayamurugan, R., et al. 2013. Influence of temperature, relative humidity and seasonal variability on ambient air quality in a coastal urban area. Int. J. Atmos. Sci. DOI: 10.1155/2013/264046.
  21. CPCB. 2020b. Impact of janta curfew and lockdown on air quality. Central Pollution Control Board, Ministry of Environment, Forest and Climate Change, Govt. of India, New Delhi.
  22. Sharma, S., et al. 2020. Effect of restricted emissions during covid-19 on air quality in India. Sci. Total Env., 728:1-8.
  23. Guttikunda, S.K. and R. V. Kopakka. 2014. Source emissions and health impacts of urban air pollution in Hyderabad, India. Air Qual. Atmos. Heal., 7, (2):195-207.
  24. Mahato, S., S. Pal and K. G. Ghosh. 2020. Effect of lockdown amid Covid-19 pandemic on air quality of the megacity Delhi, India. Sci. Total Env., 730:1-23.