Original Research

The impact of COVID-19 on air pollution in Iran in the first and second waves with emphasis on the city of Tehran


Introduction: Air pollution is one of the biggest environmental problems that has gradually spread since the industrial revolution with the consumption of fossil fuels. This situation is more visible in the capitals of industrialized and densely populated countries and towns. In late 2019, with the outbreak of the Coronavirus from China around the world, governments imposed strict restrictions on traffic and transportation to combat the epidemic. With the reduction of consumption of petroleum products in the industry and transportation system, air pollution has decreased in many cities in the world.

Materials and methods: In this study, air pollution in the provinces of Iran has been collected and analyzed more than 4500 data. Data on 40 days of quarantine from 1 March to 9 April 2020 were examined.

Results: The results of this study show that the concentrations of pollutants CO, NO2, PM10, and PM2.5 decreased by 11, 15, 10, and 6%, respectively, during the lockdown period; but, the SO2 and O3 concentration increased by 15 and 12%. The highest decrease in air pollution is related to Gilan province (-66) and the highest increase in pollution is related to Isfahan province (+37) percent. Calculations show that the AQI has decreased by 6%, but in the second wave of the disease decreased by 75% compared to the lockdown period.

Conclusion: The Coronavirus crisis has shown that air pollution can be addressed through the proper implementation of environmental policies

1. Worldometers (a). Coronavirus Cases. 2020. Available
in https://www.worldometers.info/coronavirus/
2. Iran’s Health Ministry. The latest statistics of patients
(COVID-19)., Accessed date: July 19, 2020. Available
in https://behdasht.gov.ir/
3. Gholizadeh. M H, Farajzadeh M, Darand M. The Correlation
Between Air Pollution and Human Mortality in
Tehran., Hakim Health Sys Res. 2009. 12 (2) :65-71.,
Available in http://hakim.hbi.ir/article-1-523-fa.html
4. Donyae Eqtesad Newspaper. Significant reduction in
gasoline consumption., Accessed date: April 5, 2020.
Available in www.donya-e-eqtesad.com/fa/tiny/news-
5. Tasnim News Agency. 22% reduction in car traffic in
Tehran on the first day of the social distance plan., Accessed
date: March 28, 2020. Available in www.tasnimnews.
6. Zambrano-Monserrate M A, Alejandra Ruano M, Sanchez-
Alcalde L. Indirect effects of COVID-19 on the
environment., Science of the total environment. 2020.
Volume 728. 138813. https://doi.org/10.1016/j.scitotenv.
7. Tobías A, Carnerero C, Reche C, et al. Changes in air
quality during the lockdown in Barcelona (Spain) one
month into the SARSCoV- 2 epidemic., Science of the
total environment. 2020. Volume 726, 15 July, 138540.
8. Nakada L Y, Urban C R. COVID-19 pandemic: Impacts
on the air quality during the partial lockdown in São
Paulo State, Brazil., Science of the total environment.
2020. Volume 730. 139087. https://doi.org/10.1016/j.
9. NASA Earth observatory. Airborne nitrogen dioxide
plummets over China. 2020. Available at https://
dioxide-plummets over-china
10. Broomandi. P., Karaca. F., Nikfal. A et al. Impact of
COVID-19 Event on the Air Quality in Iran. Aerosol
and Air Quality Research. 2020. 20: 1793–1804,
11. Faridi S, Yousefian F, Niazi S, et al. Impact of SARSCoV-
2 on Ambient Air Particulate Matter in Tehran.
Aerosol and Air Quality Research, 2020. 20: 1805–
1811. https://doi.org/10.4209/aaqr.2020.05.0225
12. Worldometers (b). Iran population. 2020. Accessed
date: August 14, Available in https://www.worldometers.
13. Iran National Air Quality Monitoring System (INAQMS),
14. Philip GM, DF Watson. “A Precise Method for Determining
Contoured Surfaces.” Australian Petroleum Exploration
Association Journal. 1982. 22 (1): 205–212.
15. Esri ArcMap 10.3, How Zonal statistics works. 2020.
Available in https://desktop.arcgis.com/en/arcmap/latest/
16. Sharma Sh, Zhang M, Anshika et al. Effect of Restricted
Emissions During COVID-19 on Air Quality in India.
2020. Volume 728. 138878. https://doi.org/10.1016/j.
17. Otmani A, Benchrif A, Tahri M. Impact of Covid-19
lockdown on PM10, SO2 and NO2 concentrations in
Salé City (Morocco)., Science of the Total Environment.
2020. Volume 735. 139541. https://doi.org/10.1016/j.
18. Wang P, Chen K, Zhu Sh, et al. Severe air pollution
events not avoided by reduced anthropogenic activities
during COVID-19 outbreak., Resources, Conservation
& Recycling. 2020. Volume 158. 104814. https://doi.
19. Najafpor A, Allahyari S, Bakhshjavid E, Esmaellie H.
Modeling of air pollution (carbon monoxide and nitrogen
oxides) Passenger cars in the city of Mashhad in
2011. Journal of North Khorasan University of Medical
Sciences. 2014, Volume 6. No.2: 247-257. Available in
20. Ashrafi K, Shafie Pour Motlagh M, Mousavi M,
Niksokhan M, Vosoughifar H. Determining the Contribution
of Gas Emissions from Cars and Estimating
the Distribution of CO Emissions in Enclosed Parking.
Ijhe, 2016. Volume 8. No.4 :447-458. Available in
IssueVol 5 No 3 (2020): Summer 2020 QRcode
SectionOriginal Research
DOI https://doi.org/10.18502/japh.v5i3.5391
Air pollution COVID-19 Coronavirus Lockdown period AQI

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How to Cite
Kaviani Rad A, Shariati M, Zarei M. The impact of COVID-19 on air pollution in Iran in the first and second waves with emphasis on the city of Tehran. JAPH. 2020;5(3):181-192.