Impact of COVID-19 lockdowns and seasonal variations on PM2.5 in Dhaka City
Fazlul Hoque TUSHAR, Rokshana PERVIN, Md Nazrul ISLAM, Mahmudul Hoque TUHIN, Ummay Hani UMMI, Md. Amzad HOSSAIN, Tahia RABBEE
Abstract. The COVID-19 pandemic resulted in global lockdown measures, including in Bangladesh, which significantly affected daily life. This study evaluates the effect of the imposed lockdown measures on the air quality in Dhaka City, Bangladesh, focusing particularly on the concentrations of PM2.5. The daily average PM2.5 data from March 2016 to July 2023 were collected from air quality monitoring instruments at the U.S. Consulate in Dhaka. We analyzed PM2.5 concentrations during pre-lockdown, lockdown, and post-lockdown periods and seasonal variations from 2016 to 2023. Our study showed that the mean concentration of PM2.5 had a reduction of 14.78% during the 2020 lockdown in comparison to the values found in 2019. However, there was an increase in levels of PM2.5 in subsequent years, with mean concentrations increasing by 15.48% in 2021, 24% in 2022, and 38.71% in 2023 from the 2020 levels. Seasonal analysis showed that the winter season had the highest levels of PM2.5, which can be caused by less rainfall, and an increase in brick kiln activity. The lowest levels occur during the monsoon season due to heavy rainfall, higher wind speeds, and higher relative humidity. These findings assist decision-makers in formulating effective policies to reduce PM2.5 pollution by considering vehicular, industrial, and construction activities, and meteorological factors.
Keywords
COVID-19 Pandemic, Lockdown Impact, PM2.5 Levels, Meteorological Factors, Air Quality
Published online 2/25/2025, 12 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Fazlul Hoque TUSHAR, Rokshana PERVIN, Md Nazrul ISLAM, Mahmudul Hoque TUHIN, Ummay Hani UMMI, Md. Amzad HOSSAIN, Tahia RABBEE, Impact of COVID-19 lockdowns and seasonal variations on PM2.5 in Dhaka City, Materials Research Proceedings, Vol. 48, pp 793-804, 2025
DOI: https://doi.org/10.21741/9781644903414-86
The article was published as article 86 of the book Civil and Environmental Engineering for Resilient, Smart and Sustainable Solutions
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] Rajbhandari B, Phuyal N, Shrestha B, Thapa M (2020) Air medical evacuation of nepalese citizen during epidemic of COVID-19 from Wuhan to Nepal. J Nepal Med Assoc 58:125–133. https://doi.org/10.31729/jnma.4857
[2] Adam MG, Tran PTM, Balasubramanian R (2020) Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID- 19 . The COVID-19 resource centre is hosted on Elsevier Connect , the company ’ s public news and information
[3] Chauhan A, Singh RP (2020) Decline in PM2.5 concentrations over major cities around the world associated with COVID-19. Environ Res 187:109634. https://doi.org/10.1016/j.envres.2020.109634
[4] Dhaka, Bangladesh Population (2024) – Population Stat. https://populationstat.com/bangladesh/dhaka. Accessed 31 Jul 2024
[5] Faisal Ahmed, Abu Zaher Mohammad Bayazid, Md. Monerul Islam, Md. Ziaur Rahaman, Md. Fahim Al Muntasir (2024) The terrible air pollution in Dhaka city is getting worse. GSC Adv Res Rev 19:042–052. https://doi.org/10.30574/gscarr.2024.19.1.0133
[6] IQAir (2019) World Air Quality Report
[7] Xing YF, Xu YH, Shi MH, Lian YX (2016) The impact of PM2.5 on the human respiratory system. J Thorac Dis 8:E69–E74. https://doi.org/10.3978/j.issn.2072-1439.2016.01.19
[8] Arora M, Dikshit AK, Jyoti K, Kumar A, Protection E (2018) SC
[9] Rana MM, Sulaiman N, Sivertsen B, Khan MF, Nasreen S (2016) Trends in atmospheric particulate matter in Dhaka, Bangladesh, and the vicinity. Environ Sci Pollut Res 23:17393–17403. https://doi.org/10.1007/s11356-016-6950-4
[10] Bilkis A. Begum PKH (2019) Identification of Sources from Chemical Characterization of Fine Particulate Matter and Assessment of Ambient Air Quality in Dhaka, Bangladesh. Aerosol Air Qual Res 19:. https://doi.org/10.4209/aaqr.2017.12.0604022
[11] Zarin T, Esraz-Ul-Zannat M (2023) Assessing the potential impacts of LULC change on urban air quality in Dhaka city. Ecol Indic 154:. https://doi.org/10.1016/J.ECOLIND.2023.110746
[12] de Fatima Andrade M, de Miranda RM, Fornaro A, Kerr A, Oyama B, de Andre PA, Saldiva P (2012) Vehicle emissions and PM 2.5 mass concentrations in six Brazilian cities. Air Qual Atmos Heal 5:79–88. https://doi.org/10.1007/s11869-010-0104-5
[13] Fujitani Y, Takahashi K, Saitoh K, Fushimi A, Hasegawa S, Kondo Y, Tanabe K, Takami A, Kobayashi S (2021) Contribution of industrial and traffic emissions to ultrafine, fine, coarse particles in the vicinity of industrial areas in Japan. Environ Adv 5:100101. https://doi.org/10.1016/j.envadv.2021.100101
[14] Zhang N, Huang H, Duan X, Zhao J, Su B (2018) Quantitative association analysis between PM2.5 concentration and factors on industry, energy, agriculture, and transportation. Sci Rep 8:1–9. https://doi.org/10.1038/s41598-018-27771-w
[15] Hossain MA, Zahid AM, Arifunnahar M, Siddique MNA (2019) Effect of brick kiln on arable land degradation, environmental pollution and consequences on livelihood of Bangladesh. J Sci Technol Environ Informatics 6:474–488. https://doi.org/10.18801/JSTEI.060219.50
[16] Guttikunda SK, Begum BA, Wadud Z (2013) Particulate pollution from brick kiln clusters in the Greater Dhaka region, Bangladesh. Air Qual Atmos Heal 6:357–365. https://doi.org/10.1007/s11869-012-0187-2
[17] Rahaman MO, Roksana K, Mukit M, Rahaman MM (2020) Spatial and Temporal Trends of Air Quality around Dhaka City: A GIS Approach. Spat Temporal Trends Air Qual around Dhaka City A GIS Approach Res 11:8
[18] Rahman MM, Mahamud S, Thurston GD (2019) Recent spatial gradients and time trends in Dhaka, Bangladesh, air pollution and their human health implications. J Air Waste Manag Assoc 69:478–501. https://doi.org/10.1080/10962247.2018.1548388
[19] Islam S (2021) COVID-19 and the Construction Industries in Dhaka, Bangladesh. Acad Lett. https://doi.org/10.20935/AL3971
[20] Marinello S, Butturi MA, Gamberini R (2021) How changes in human activities during the lockdown impacted air quality parameters: A review. Environ Prog Sustain Energy 40:1–18. https://doi.org/10.1002/ep.13672
[21] Kotsiou OS, Saharidis GKD, Kalantzis G, Fradelos EC, Gourgoulianis KI (2021) The Impact of the Lockdown Caused by the COVID-19 Pandemic on the Fine Particulate Matter (PM2.5) Air Pollution: The Greek Paradigm. Int J Environ Res Public Heal 2021, Vol 18, Page 6748 18:6748. https://doi.org/10.3390/IJERPH18136748
[22] Sarkar SK, Khan MMH (2021) Impact of COVID-19 on PM2.5 Pollution in Fastest-Growing Megacity Dhaka, Bangladesh. Disaster Med Public Health Prep 16:2339–2342. https://doi.org/10.1017/dmp.2021.131
[23] Islam MM, Afrin S, Ahmed T, Ashraf Ali M (2015) Meteorological and seasonal influences in ambient air quality parameters of Dhaka city. J Civ Eng 43:67–77
[24] Islam N, Saroar MG, Ahmed T (2018) Meteorological influences on atmospheric particles in Darus Salam Area of Dhaka City. Proc 4th Int Conf Civ Eng Sustain Dev (ICCESD 2018) 1 – 12
[25] Hossain KMA, Easa SM (2012) Pollutant dispersion characteristics in Dhaka city, Bangladesh. Asia-Pacific J Atmos Sci 48:35–41. https://doi.org/10.1007/s13143-012-0004-8
[26] Etajak S, Atuyambe L, Bazeyo W, Walyawula F, Nyabigambo A, Kumie A, Dessie K, Partz J, Samet JM, Berhane K (2020) Effect of Relative Humidity and Temperature on PM2.5 Concentrations in Kampala, Uganda. ISEE Conf Abstr 2020:. https://doi.org/10.1289/ISEE.2020.VIRTUAL.P-0368
[27] Mukta TA, Hoque MMM, Sarker ME, Hossain MN, Biswas GK (2020) Seasonal variations of gaseous air pollutants (SO2, NO2, O3, CO) and particulates (PM2.5, PM10) in Gazipur: An industrial city in Bangladesh. Adv Environ Technol 6:195–209. https://doi.org/10.22104/AET.2021.4890.1320
[28] Asian Development Bank (2013) Bangladesh: Fact Sheet. 1–4
