Real-Time Ambient Environmental And Noise Pollution Monitoring System In High-Density Areas Of Malang City Using Internet Of Things (IoT) Technology
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Mar 14, 2026
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Abstract
This study evaluated real-time ambient environment and sound pollution monitoring system using Internet of Things (IoT). This system detects wide range of temperature, humidity, fine particulate matter (PM2.5), Carbon monoxide (CO), Carbon dioxide (CO2), and noise level in six traffic areas in Malang City during peak hours. Using a variety of sensors, the system continuously monitors ambient environment and noise pollution at 06:00-07:00, 11:00-12:01, 15:00-16:02. The monitoring tools was placed ±3 meters from the roadside near to the traffic light. Data were collected during peak traffic hours, emphasizing the direct impact of car emissions on air quality. Intense vehicle activity has contributed to increased temperatures and higher particulate matter in specific areas. However, CO, CO₂ and noise levels were observed to remain within acceptable safety thresholds. Notably, this study identified an inverse correlation between temperature and humidity. The IoT-based environmental monitoring system, deployed across six high-traffic locations in Malang, has been successfully implemented and effectively operated. This study investigated environmental factors that greater than threshold using IoT monitoring system deserving further evaluation
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ZAFIRAH, Yasmin et al.
Real-Time Ambient Environmental And Noise Pollution Monitoring System In High-Density Areas Of Malang City Using Internet Of Things (IoT) Technology.
Proceedings of the International Conference on Green Technology, [S.l.], v. 15, n. 1, mar. 2026.
ISSN 2580-7099.
Available at: <https://conferences.uin-malang.ac.id/index.php/ICGT/article/view/3838>. Date accessed: 01 may 2026.
doi: https://doi.org/10.18860/icgt.v15i1.3838.
Section
Environmental Science
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
References
[1] J. Hansen, M. Sato, R. Ruedy, K. Lo, D. Lea, and M. Medina-Elizalde, "Global temperature change," Proceedings of the National Academy of Sciences of the United States of America, vol. 103, pp. 14288–14293, 2006, doi: 10.1073/pnas.0606291103.
[2] T. Bauska, "Ice cores and climate change," British Antarctic Survey, 2022.
[3] IPCC., "Climate Change 2014 Synthesis Report," 2015, doi: 10.1016/S0022-0248(00)00575-3.
[4] Y. Liu, D. Dajnak, N. Assareh, A. Beddows, G. Stewart, M. Holland, D. Evangelopoulos, D. Wood, T. Vu, H. Walton, C. Brand, S. Beevers, and D. Fecht, "Impact of net zero policy scenarios on air pollution inequalities in England and Wales," Environment International, vol. 193, 2024, doi: 10.1016/j.envint.2024.109065.
[5] Y. Zafirah, Y. K. Lin, G. Andhikaputra, L. W. Deng, F. C. Sung, and Y. C. Wang, "Mortality and morbidity of asthma and chronic obstructive pulmonary disease associated with ambient environment in metropolitans in taiwan," PLoS ONE, vol. 16, pp. 1–16, 2021, doi: 10.1371/journal.pone.0253814.
[6] Y. Zafirah, Y. K. Lin, G. Andhikaputra, F. C. Sung, L. W. Deng, and Y. C. Wang, "Mortality and morbidity of chronic kidney disease associated with ambient environment in metropolitans in Taiwan," Atmospheric Environment, vol. 289, 2022, doi: 10.1016/j.atmosenv.2022.119317.
[7] WHO., "Ambient (outdoor) air pollution," 2024. [Online]. Available: https://www.who.int/news-room/fact-sheets/detail/ambient-(outdoor)-air-quality-and-health?gad_source=1&gclid=Cj0KCQiA0fu5BhDQARIsAMXUBOKc7O36qpuJLOibqlZTsHJH12zwAvci0a3Jh93gHHUxQhSO_A6LeecaAoESEALw_wcB.
[8] B. S. Dewa and I. H. Santoso, "Perancangan Dan Implementasi Alat Pendeteksi Kebisingan Kendaraan Bermotor Berbasis Internet Of Things Dengan Menggunakan Sensor KY-037 Dan Sensor MAX4466 The Design And Implementation Of Motor Vehicle Noise Detection Equipment Based On Internet Of Things," EProceedings of Engineering, vol. 8, no. 6, 2022.
[9] X. Gong, B. Fenech, C. Blackmore, Y. Chen, G. Rodgers, J. Gulliver, and A. L. Hansell, "Association between Noise Annoyance and Mental Health Outcomes: A Systematic Review and Meta-Analysis," 2022, doi: 10.3390/ijerph19052696.
[10] A. Mehrotra, S. P. Shukla, A. K. Shukla, M. K. Manar, S. K. Singh, and M. Mehrotra, "A Comprehensive Review of Auditory and Non-Auditory Effects of Noise on Human Health," Noise and Health, vol. 26, no. 121, 2024. [Online]. Available: https://journals.lww.com/nohe/fulltext/2024/26210/a_comprehensive_review_of_auditory_and.1.aspx.
[11] E. Atmaca, I. Peker, and A. Altin, "Industrial Noise and Its Effects on Humans," 14(6), vol. 14, no. 6, pp. 721–726, 2005.
[12] N. Jaafar, M. Y. Baharuddin, S. Aminudin, N. Yazid, M. Salleh, and M. Tahir, "Hearing Loss and Noise Exposure: A Review," 6, vol. 128, pp. 128–134, 2023.
[13] P. Agista, N. Gusdini, and M. Maharani, "ANALISIS KUALITAS UDARA DENGAN INDEKS STANDAR PENCEMAR UDARA (ISPU) DAN SEBARAN KADAR POLUTANNYA DI PROVINSI DKI JAKARTA," Sustainable Environmental and Optimizing Industry Journal, vol. 2, pp. 39–57, 2020, doi: 10.36441/seoi.v2i2.491.
[14] E. Apriawati, A. A. Kiswandono, and B. Lampung, "KAJIAN INDEKS STANDAR POLUSI UDARA ( ISPU ) NITROGEN DIOKSIDA ( NO 2 ) DI TIGA LOKASI KOTA BANDAR LAMPUNG," 2(01), vol. 2, no. 01, pp. 42–51, 2017.
[15] C. W. Kamonrat Kamjornkittikoon, "A comprehensive review on advancements in sensors for air pollution applications," Science of the Total Environment, vol. 951, 2024, doi: 10.1016/j.scitotenv.2024.175696.
[16] P. Deshmukh, S. Kimbrough, S. Krabbe, R. Logan, V. Isakov, and R. Baldauf, "Identifying air pollution source impacts in urban communities using mobile monitoring," Science of the Total Environment, vol. 715, 2020, doi: 10.1016/j.scitotenv.2020.136979.
[17] M. N. A. Ramadan, M. A. H. Ali, S. Y. Khoo, M. Alkhedher, and M. Alherbawi, "Real-time IoT-powered AI system for monitoring and forecasting of air pollution in industrial environment," Ecotoxicology and Environmental Safety, vol. 283, 2024, doi: 10.1016/j.ecoenv.2024.116856.
[18] E. Collado, S. Calderón, B. Cedeño, O. De León, M. Centella, A. García, and Y. Sáez, "Open-source Internet of Things (IoT)-based air pollution monitoring system with protective case for tropical environments," HardwareX, vol. 19, 2024, doi: 10.1016/j.ohx.2024.e00560.
[19] T. Fischer, "IoT Based Noise Monitoring System ( NOMOS ) IoT Based Noise Monitoring System ( NOMOS )," 2020, doi: 10.1088/1757-899X/884/1/012080.
[20] N. Irbah, G. Nurika, and A. Ramani, "Implementation of Indoor Air Quality Monitoring Systems of Particulate Matter 2.5 Based on the Internet of Things," Jurnal Kesehatan Lingkungan, vol. 16, no. 3, pp. 266–276, 2024, doi: 10.20473/jkl.v16i3.2024.266-276.
[21] S. M. S. D. Malleswari and T. K. Mohana, "Air pollution monitoring system using IoT devices: Review," Materials Today: Proceedings, vol. 51, pp. 1147–1150, 2022, doi: 10.1016/j.matpr.2021.07.114.
[22] World Meteorological Organization., "2024 is on track to be hottest year on record as warming temporarily hits 1.5°C," 2024. [Online]. Available: https://wmo.int/news/media-centre/2024-track-be-hottest-year-record-warming-temporarily-hits-15degc.
[23] S. Syed Othman Thani, N. Mohamad, and S. Syed Abdullah, "Influence of Urban Landscapes to Microclimatic Variances in a Tropical City," Asian Journal of Behavioural Studies, vol. 2, 2017, doi: 10.21834/ajbes.v2i7.40.
[24] PP Nomor 22 Tahun 2021., "Peraturan Pemerintah Nomor 22 Tahun 2021 tentang Pedoman Perlindungan dan Pengelolaan Lingkungan Hidup," Sekretariat Negara Republik Indonesia, vol. 1, pp. 1–483, 2021. [Online]. Available: http://www.jdih.setjen.kemendagri.go.id/.
[25] E. Zender-Świercz, B. Galiszewska, M. Telejko, and M. Starzomska, "The effect of temperature and humidity of air on the concentration of particulate matter - PM2.5 and PM10," Atmospheric Research, vol. 312, 2024, doi: 10.1016/j.atmosres.2024.107733.
[26] D. Harista. and L. Teknik, "dihasilkan dari kegiatan penerbangan maupun kegiatan ground handling dan kegiatan main power station di Bandara Halim Perdanakusuma pada tahun 2014-2018," Lewat karya ilmiah ini, pp. 2014–2017, 2020.
[27] MENTERI NEGARA LINGKUNGAN HIDUP., "BAKU TINGKAT KEBISINGAN," MENTERI NEGARA LINGKUNGAN HIDUP NOMOR : KEP-48/MENLH/11/1996, vol. 66, pp. 37–39, 1996.
[28] A. Arregi, O. Vegas, A. Lertxundi, A. Silva, I. Ferreira, A. Bereziartua, M. T. Cruz, and N. Lertxundi, "Road traffic noise exposure and its impact on health: evidence from animal and human studies—chronic stress, inflammation, and oxidative stress as key components of the complex downstream pathway underlying noise-induced non-auditory health effects," Environmental Science and Pollution Research, vol. 31, no. 34, pp. 46820–46839, 2024, doi: 10.1007/s11356-024-33973-9.
[29] M. Lutman, "What Is the Risk of Noise-Induced Hearing Loss at 80, 85, 90 dB(A) and Above? Occupational Medicine (Oxford, England), 50, 274–275," 2000, doi: 10.1093/occmed/50.4.274.
[30] N. Mutalib, N. Mashros, E. Aminudin, R. Zakaria, Z. Haron, M. Talib, and A. R. Abdul Hamid, "Disturbance of Traffic Noise: Evaluation on the Effects and Management on Road Corridors," IOP Conference Series: Earth and Environmental Science, vol. 143, 2018, doi: 10.1088/1755-1315/143/1/012049.
[31] BPS., "Jumlah Kasus Penyakit Terbanyak di Kota Malang (Jiwa)," 2019. [Online]. Available: https://malangkota.bps.go.id/id/statistics-table/2/MzcxIzI=/jumlah-kasus-penyakit-terbanyak-di-kota-malang.html.
[32] D. P. Croft, W. Zhang, S. Lin, S. W. Thurston, P. K. Hopke, M. Masiol, S. Squizzato, E. van Wijngaarden, M. J. Utell, and D. Q. Rich, "The Association between Respiratory Infection and Air Pollution in the Setting of Air Quality Policy and Economic Change," Annals of the American Thoracic Society, vol. 16, no. 3, pp. 321–330, 2019, doi: 10.1513/AnnalsATS.201810-691OC.
[33] A. Monoson, E. Schott, K. Ard, B. Kilburg-Basnyat, R. M. Tighe, S. Pannu, and K. M. Gowdy, "Air pollution and respiratory infections: the past, present, and future," Toxicological Sciences : An Official Journal of the Society of Toxicology, vol. 192, no. 1, pp. 3–14, 2023, doi: 10.1093/toxsci/kfad003.
[34] H. M. Tran, F. Tsai, Y. Lee, J. Chang, L. Chang, T. Chang, K. F. Chung, H. Kuo, K. Lee, K. Chuang, and H. Chuang, "The impact of air pollution on respiratory diseases in an era of climate change: A review of the current evidence," Science of The Total Environment, vol. 898, 2023, doi: 10.1016/j.scitotenv.2023.166340.
[35] D. Irwanto, "Cuaca Ekstrem Picu Lonjakan Ispa di Malang," 2023. [Online]. Available: https://www.metrotvnews.com/read/kj2Cnq3Q-cuaca-ekstrem-picu-lonjakan-ispa-di-malang.
[36] Pemerintah Kota Malang, "(2023a)," Dinas Lingkungan Hidup. Profil Dinas Lingkungan Hidup, vol. 6, pp. 0–96.
[37] B. J. W. Utomo, "Mengurangi Emisi Co2 Dan Co Untuk Menuju Ruang Kehidupan Kota Yang Nyaman Dan Berkelanjutan Di Kawasan Kota Malang," Spectra, vol. 10, no. 20, pp. 1–10, 2012.
[38] BMKG., "Potensi Wilayah Terdampak El Nino," [Online]. Available: https://www.bmkg.go.id/iklim/potensi-wilayah-terdampak-elnino.bmkg.
[39] W. H. Organization, "WHO global air quality guidelines: particulate matter (PM2.5 and PM10), ozone, nitrogen dioxide, sulfur dioxide and carbon monoxide," [Online]. Available: https://iris.who.int/handle/10665/345329.
[2] T. Bauska, "Ice cores and climate change," British Antarctic Survey, 2022.
[3] IPCC., "Climate Change 2014 Synthesis Report," 2015, doi: 10.1016/S0022-0248(00)00575-3.
[4] Y. Liu, D. Dajnak, N. Assareh, A. Beddows, G. Stewart, M. Holland, D. Evangelopoulos, D. Wood, T. Vu, H. Walton, C. Brand, S. Beevers, and D. Fecht, "Impact of net zero policy scenarios on air pollution inequalities in England and Wales," Environment International, vol. 193, 2024, doi: 10.1016/j.envint.2024.109065.
[5] Y. Zafirah, Y. K. Lin, G. Andhikaputra, L. W. Deng, F. C. Sung, and Y. C. Wang, "Mortality and morbidity of asthma and chronic obstructive pulmonary disease associated with ambient environment in metropolitans in taiwan," PLoS ONE, vol. 16, pp. 1–16, 2021, doi: 10.1371/journal.pone.0253814.
[6] Y. Zafirah, Y. K. Lin, G. Andhikaputra, F. C. Sung, L. W. Deng, and Y. C. Wang, "Mortality and morbidity of chronic kidney disease associated with ambient environment in metropolitans in Taiwan," Atmospheric Environment, vol. 289, 2022, doi: 10.1016/j.atmosenv.2022.119317.
[7] WHO., "Ambient (outdoor) air pollution," 2024. [Online]. Available: https://www.who.int/news-room/fact-sheets/detail/ambient-(outdoor)-air-quality-and-health?gad_source=1&gclid=Cj0KCQiA0fu5BhDQARIsAMXUBOKc7O36qpuJLOibqlZTsHJH12zwAvci0a3Jh93gHHUxQhSO_A6LeecaAoESEALw_wcB.
[8] B. S. Dewa and I. H. Santoso, "Perancangan Dan Implementasi Alat Pendeteksi Kebisingan Kendaraan Bermotor Berbasis Internet Of Things Dengan Menggunakan Sensor KY-037 Dan Sensor MAX4466 The Design And Implementation Of Motor Vehicle Noise Detection Equipment Based On Internet Of Things," EProceedings of Engineering, vol. 8, no. 6, 2022.
[9] X. Gong, B. Fenech, C. Blackmore, Y. Chen, G. Rodgers, J. Gulliver, and A. L. Hansell, "Association between Noise Annoyance and Mental Health Outcomes: A Systematic Review and Meta-Analysis," 2022, doi: 10.3390/ijerph19052696.
[10] A. Mehrotra, S. P. Shukla, A. K. Shukla, M. K. Manar, S. K. Singh, and M. Mehrotra, "A Comprehensive Review of Auditory and Non-Auditory Effects of Noise on Human Health," Noise and Health, vol. 26, no. 121, 2024. [Online]. Available: https://journals.lww.com/nohe/fulltext/2024/26210/a_comprehensive_review_of_auditory_and.1.aspx.
[11] E. Atmaca, I. Peker, and A. Altin, "Industrial Noise and Its Effects on Humans," 14(6), vol. 14, no. 6, pp. 721–726, 2005.
[12] N. Jaafar, M. Y. Baharuddin, S. Aminudin, N. Yazid, M. Salleh, and M. Tahir, "Hearing Loss and Noise Exposure: A Review," 6, vol. 128, pp. 128–134, 2023.
[13] P. Agista, N. Gusdini, and M. Maharani, "ANALISIS KUALITAS UDARA DENGAN INDEKS STANDAR PENCEMAR UDARA (ISPU) DAN SEBARAN KADAR POLUTANNYA DI PROVINSI DKI JAKARTA," Sustainable Environmental and Optimizing Industry Journal, vol. 2, pp. 39–57, 2020, doi: 10.36441/seoi.v2i2.491.
[14] E. Apriawati, A. A. Kiswandono, and B. Lampung, "KAJIAN INDEKS STANDAR POLUSI UDARA ( ISPU ) NITROGEN DIOKSIDA ( NO 2 ) DI TIGA LOKASI KOTA BANDAR LAMPUNG," 2(01), vol. 2, no. 01, pp. 42–51, 2017.
[15] C. W. Kamonrat Kamjornkittikoon, "A comprehensive review on advancements in sensors for air pollution applications," Science of the Total Environment, vol. 951, 2024, doi: 10.1016/j.scitotenv.2024.175696.
[16] P. Deshmukh, S. Kimbrough, S. Krabbe, R. Logan, V. Isakov, and R. Baldauf, "Identifying air pollution source impacts in urban communities using mobile monitoring," Science of the Total Environment, vol. 715, 2020, doi: 10.1016/j.scitotenv.2020.136979.
[17] M. N. A. Ramadan, M. A. H. Ali, S. Y. Khoo, M. Alkhedher, and M. Alherbawi, "Real-time IoT-powered AI system for monitoring and forecasting of air pollution in industrial environment," Ecotoxicology and Environmental Safety, vol. 283, 2024, doi: 10.1016/j.ecoenv.2024.116856.
[18] E. Collado, S. Calderón, B. Cedeño, O. De León, M. Centella, A. García, and Y. Sáez, "Open-source Internet of Things (IoT)-based air pollution monitoring system with protective case for tropical environments," HardwareX, vol. 19, 2024, doi: 10.1016/j.ohx.2024.e00560.
[19] T. Fischer, "IoT Based Noise Monitoring System ( NOMOS ) IoT Based Noise Monitoring System ( NOMOS )," 2020, doi: 10.1088/1757-899X/884/1/012080.
[20] N. Irbah, G. Nurika, and A. Ramani, "Implementation of Indoor Air Quality Monitoring Systems of Particulate Matter 2.5 Based on the Internet of Things," Jurnal Kesehatan Lingkungan, vol. 16, no. 3, pp. 266–276, 2024, doi: 10.20473/jkl.v16i3.2024.266-276.
[21] S. M. S. D. Malleswari and T. K. Mohana, "Air pollution monitoring system using IoT devices: Review," Materials Today: Proceedings, vol. 51, pp. 1147–1150, 2022, doi: 10.1016/j.matpr.2021.07.114.
[22] World Meteorological Organization., "2024 is on track to be hottest year on record as warming temporarily hits 1.5°C," 2024. [Online]. Available: https://wmo.int/news/media-centre/2024-track-be-hottest-year-record-warming-temporarily-hits-15degc.
[23] S. Syed Othman Thani, N. Mohamad, and S. Syed Abdullah, "Influence of Urban Landscapes to Microclimatic Variances in a Tropical City," Asian Journal of Behavioural Studies, vol. 2, 2017, doi: 10.21834/ajbes.v2i7.40.
[24] PP Nomor 22 Tahun 2021., "Peraturan Pemerintah Nomor 22 Tahun 2021 tentang Pedoman Perlindungan dan Pengelolaan Lingkungan Hidup," Sekretariat Negara Republik Indonesia, vol. 1, pp. 1–483, 2021. [Online]. Available: http://www.jdih.setjen.kemendagri.go.id/.
[25] E. Zender-Świercz, B. Galiszewska, M. Telejko, and M. Starzomska, "The effect of temperature and humidity of air on the concentration of particulate matter - PM2.5 and PM10," Atmospheric Research, vol. 312, 2024, doi: 10.1016/j.atmosres.2024.107733.
[26] D. Harista. and L. Teknik, "dihasilkan dari kegiatan penerbangan maupun kegiatan ground handling dan kegiatan main power station di Bandara Halim Perdanakusuma pada tahun 2014-2018," Lewat karya ilmiah ini, pp. 2014–2017, 2020.
[27] MENTERI NEGARA LINGKUNGAN HIDUP., "BAKU TINGKAT KEBISINGAN," MENTERI NEGARA LINGKUNGAN HIDUP NOMOR : KEP-48/MENLH/11/1996, vol. 66, pp. 37–39, 1996.
[28] A. Arregi, O. Vegas, A. Lertxundi, A. Silva, I. Ferreira, A. Bereziartua, M. T. Cruz, and N. Lertxundi, "Road traffic noise exposure and its impact on health: evidence from animal and human studies—chronic stress, inflammation, and oxidative stress as key components of the complex downstream pathway underlying noise-induced non-auditory health effects," Environmental Science and Pollution Research, vol. 31, no. 34, pp. 46820–46839, 2024, doi: 10.1007/s11356-024-33973-9.
[29] M. Lutman, "What Is the Risk of Noise-Induced Hearing Loss at 80, 85, 90 dB(A) and Above? Occupational Medicine (Oxford, England), 50, 274–275," 2000, doi: 10.1093/occmed/50.4.274.
[30] N. Mutalib, N. Mashros, E. Aminudin, R. Zakaria, Z. Haron, M. Talib, and A. R. Abdul Hamid, "Disturbance of Traffic Noise: Evaluation on the Effects and Management on Road Corridors," IOP Conference Series: Earth and Environmental Science, vol. 143, 2018, doi: 10.1088/1755-1315/143/1/012049.
[31] BPS., "Jumlah Kasus Penyakit Terbanyak di Kota Malang (Jiwa)," 2019. [Online]. Available: https://malangkota.bps.go.id/id/statistics-table/2/MzcxIzI=/jumlah-kasus-penyakit-terbanyak-di-kota-malang.html.
[32] D. P. Croft, W. Zhang, S. Lin, S. W. Thurston, P. K. Hopke, M. Masiol, S. Squizzato, E. van Wijngaarden, M. J. Utell, and D. Q. Rich, "The Association between Respiratory Infection and Air Pollution in the Setting of Air Quality Policy and Economic Change," Annals of the American Thoracic Society, vol. 16, no. 3, pp. 321–330, 2019, doi: 10.1513/AnnalsATS.201810-691OC.
[33] A. Monoson, E. Schott, K. Ard, B. Kilburg-Basnyat, R. M. Tighe, S. Pannu, and K. M. Gowdy, "Air pollution and respiratory infections: the past, present, and future," Toxicological Sciences : An Official Journal of the Society of Toxicology, vol. 192, no. 1, pp. 3–14, 2023, doi: 10.1093/toxsci/kfad003.
[34] H. M. Tran, F. Tsai, Y. Lee, J. Chang, L. Chang, T. Chang, K. F. Chung, H. Kuo, K. Lee, K. Chuang, and H. Chuang, "The impact of air pollution on respiratory diseases in an era of climate change: A review of the current evidence," Science of The Total Environment, vol. 898, 2023, doi: 10.1016/j.scitotenv.2023.166340.
[35] D. Irwanto, "Cuaca Ekstrem Picu Lonjakan Ispa di Malang," 2023. [Online]. Available: https://www.metrotvnews.com/read/kj2Cnq3Q-cuaca-ekstrem-picu-lonjakan-ispa-di-malang.
[36] Pemerintah Kota Malang, "(2023a)," Dinas Lingkungan Hidup. Profil Dinas Lingkungan Hidup, vol. 6, pp. 0–96.
[37] B. J. W. Utomo, "Mengurangi Emisi Co2 Dan Co Untuk Menuju Ruang Kehidupan Kota Yang Nyaman Dan Berkelanjutan Di Kawasan Kota Malang," Spectra, vol. 10, no. 20, pp. 1–10, 2012.
[38] BMKG., "Potensi Wilayah Terdampak El Nino," [Online]. Available: https://www.bmkg.go.id/iklim/potensi-wilayah-terdampak-elnino.bmkg.
[39] W. H. Organization, "WHO global air quality guidelines: particulate matter (PM2.5 and PM10), ozone, nitrogen dioxide, sulfur dioxide and carbon monoxide," [Online]. Available: https://iris.who.int/handle/10665/345329.