Pollution and Risk Level Assessment of Pollutants in Surface Water Bodies

Giao Thanh Nguyen, Mi Le Thi Diem, Nhien Thi Hong Huynh


The study was carried out to assess the pollution, impact, and risk level to the surface water environment of pollutants in the water bodies of Soc Trang province, Vietnam. The parameters for evaluating surface water quality and risks included temperature, pH, TSS, DO, BOD, COD, NH4+-N, NO2--N, NO3--N, PO43--P, Cl-, Fet, and coliform. Surface water samples were collected at 35 locations with a frequency of six times (February, April, June, August, October, and December) in 2022. The water quality index (WQI), impact and risk level (risk quotient or RQ, RQ-F), correlation analysis, and principal component analysis (PCA) were utilized in the study. The results show that the surface water has been seriously polluted due to organic matter, nutrients, microorganisms, iron, and salinity. The values of WQI in the dry and rainy seasons fluctuated between bad and very good, indicating that surface water quality is suitable for water transport and other purposes with higher quality requirements. TSS, COD, Fet and coliform have a high impact and risk for the environment in this study area. There were no environmental impacts and risks to NO3--N. Locations with many high-risk pollutants were mainly distributed in residential and coastal areas. The significant negative correlation between the WQI and RQ indicated that the lower the WQI, the higher the environmental risk. The PCA results show that at least six polluting sources affected water quality and caused environmental risks. The results of this study contribute essential and valuable information for improving water quality in the study area through the assessment of environmental impacts and risks.


Doi: 10.28991/CEJ-2023-09-08-03

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Organic Matters; Risk Level Assessment; Soc Trang Province; Pollutants; Surface Water Bodies.


Haseena, M., Faheem Malik, M., Javed, A., Arshad, S., Asif, N., Zulfiqar, S., & Hanif, J. (2017). Water pollution and human health. Environmental Risk Assessment and Remediation, 1(3), 16-19. doi:10.4066/2529-8046.100020.

Khan, M. A., & Ghouri, A. M. (2011). Environmental pollution: its effects on life and its remedies. Researcher World: Journal of Arts, Science & Commerce, 2(2), 276-285.

Muoi, L. Van, Srilert, C., Dang Tri, V. P., & Pham Van, T. (2022). Spatial and temporal variabilities of surface water and sediment pollution at the main tidal-influenced river in Ca Mau Peninsular, Vietnamese Mekong Delta. Journal of Hydrology: Regional Studies, 41, 101082. doi:10.1016/j.ejrh.2022.101082.

Jayasiri, M. M. J. G. C. N., Yadav, S., Dayawansa, N. D. K., Propper, C. R., Kumar, V., & Singleton, G. R. (2022). Spatio-temporal analysis of water quality for pesticides and other agricultural pollutants in Deduru Oya river basin of Sri Lanka. Journal of Cleaner Production, 330, 129897. doi:10.1016/j.jclepro.2021.129897.

Vu, L. D., Tuan, M. C., Duyen, D. T. M., Anh, H. T. L., Thanh, T., & Tuong, L. Q. (2022). Surface Water Quality of Selected Tributaries Flowing Through Two Districts, Ho Chi Minh City, Vietnam. Journal of Nano- and Electronic Physics, 14(3), 03002–03006. doi:10.21272/jnep.14(3).03002.

Nguyen, K. T. T., Vo, C. T. D., Ngo, A. T., Doan, N. T., Huynh, L. P., & Tran, D. H. T. (2022). Water Quality Assessment of Surface Water at the Urban Area of An-Giang Province, Vietnam. Pertanika Journal of Science and Technology, 30(3), 2205–2223. doi:10.47836/pjst.30.3.26.

Phu, H., & Thao, N. L. N. (2021). HAN HTN Assessment of water quality in Long Xuyen quadrangle and measures for the protection of local water resources. Vietnam Journal of Hydro-Meteorology, 723, 13.

Drouiche, A., Zahi, F., Debieche, T.-H., Lekoui, A., & Mahdid, S. (2022). Assessment of surface water quality: a case of Jijel region, North-East Algeria. Arabian Journal of Geosciences, 15(3), 252. doi:10.1007/s12517-022-09458-9.

Sun, K., Song, Y., He, F., Jing, M., Tang, J., & Liu, R. (2021). A review of human and animals exposure to polycyclic aromatic hydrocarbons: Health risk and adverse effects, photo-induced toxicity and regulating effect of microplastics. Science of the Total Environment, 773, 145403. doi:10.1016/j.scitotenv.2021.145403.

Iwai, C. B., Khaung, T., Prasopsuk, J., & Ravindran, B. (2022). Environmental risk assessment of floating gardens in Inle Lake, Myanmar. Urban Climate, 44, 101194. doi:10.1016/j.uclim.2022.101194.

Zeleňáková, M., Kubiak-Wojcicka, K., Weiss, R., Weiss, E., & Elhamid, H. F. A. (2021). Environmental risk assessment focused on water quality in the Laborec River watershed. Ecohydrology & Hydrobiology, 21(4), 641–654. doi:10.1016/j.ecohyd.2021.06.002.

Zhou, S., Di Paolo, C., Wu, X., Shao, Y., Seiler, T. B., & Hollert, H. (2019). Optimization of screening-level risk assessment and priority selection of emerging pollutants – The case of pharmaceuticals in European surface waters. Environment International, 128, 1–10. doi:10.1016/j.envint.2019.04.034.

Peck Yen, T., & Rohasliney, H. (2013). Status of water quality subject to sand mining in the Kelantan River, Kelantan. Tropical Life Sciences Research, 24(1), 19–34.

Santos, R., Joyeux, A., Besnard, A., Blanchard, C., Halkett, C., Bony, S., Sanchez, W., & Devaux, A. (2017). An integrative approach to assess ecological risks of surface water contamination for fish populations. Environmental Pollution, 220(A), 588–596. doi:10.1016/j.envpol.2016.10.007.

Abdul Maulud, K. N., Fitri, A., Wan Mohtar, W. H. M., Wan Mohd Jaafar, W. S., Zuhairi, N. Z., & Kamarudin, M. K. A. (2021). A study of spatial and water quality index during dry and rainy seasons at Kelantan River Basin, Peninsular Malaysia. Arabian Journal of Geosciences, 14(2). doi:10.1007/s12517-020-06382-8.

APHA. (1998). Standard Methods for the Examination of Water and Wastewater (20th Ed.). American Public Health Association (APHA), Washington, United States.

Vietnam Environment Administration (2019). Decision No. 1460/QD-TCMT on issuing Technical guidelines for calculating and publishing the Vietnam water quality index (VN_WQI). Vietnam Environment Administration, Hanoi, Vietnam.

Xie, H., Wang, X., Chen, J., Li, X., Jia, G., Zou, Y., Zhang, Y., & Cui, Y. (2019). Occurrence, distribution and ecological risks of antibiotics and pesticides in coastal waters around Liaodong Peninsula, China. Science of the Total Environment, 656, 946–951. doi:10.1016/j.scitotenv.2018.11.449.

MoNRE. (2015). QCVN 08-MT:2015/BTNMT - Vietnamese technical regulation on surface water quality. Ministry of Natural Resources and Environment (MoNRE), Hanoi, Vietnam.

Wan Mohtar, W. H. M., Abdul Maulud, K. N., Muhammad, N. S., Sharil, S., & Yaseen, Z. M. (2019). Spatial and temporal risk quotient based river assessment for water resources management. Environmental Pollution, 248, 133–144. doi:10.1016/j.envpol.2019.02.011.

García-Ávila, F., Zhindón-Arévalo, C., Valdiviezo-Gonzales, L., Cadme-Galabay, M., Gutiérrez-Ortega, H., & del Pino, L. F. (2022). A comparative study of water quality using two quality indices and a risk index in a drinking water distribution network. Environmental Technology Reviews, 11(1), 49–61. doi:10.1080/21622515.2021.2013955.

Ustaoğlu, F., Tepe, Y., & Taş, B. (2020). Assessment of stream quality and health risk in a subtropical Turkey river system: A combined approach using statistical analysis and water quality index. Ecological Indicators, 113, 105815. doi:10.1016/j.ecolind.2019.105815.

Fatima, S. U., Khan, M. A., Siddiqui, F., Mahmood, N., Salman, N., Alamgir, A., & Shaukat, S. S. (2022). Geospatial assessment of water quality using principal components analysis (PCA) and water quality index (WQI) in Basho Valley, Gilgit Baltistan (Northern Areas of Pakistan). Environmental Monitoring and Assessment, 194(3). doi:10.1007/s10661-022-09845-5.

Matta, G., Nayak, A., Kumar, A., & Kumar, P. (2020). Water quality assessment using NSFWQI, OIP and multivariate techniques of Ganga River system, Uttarakhand, India. Applied Water Science, 10(9), 206. doi:10.1007/s13201-020-01288-y.

Sharma, G., Lata, R., Thakur, N., Bajala, V., Kuniyal, J. C., & Kumar, K. (2021). Application of multivariate statistical analysis and water quality index for quality characterization of Parbati River, Northwestern Himalaya, India. Discover Water, 1(1). doi:10.1007/s43832-021-00005-3.

Cho, Y. C., Choi, H., Lee, M. G., Kim, S. H., & Im, J. K. (2022). Identification and Apportionment of Potential Pollution Sources Using Multivariate Statistical Techniques and APCS-MLR Model to Assess Surface Water Quality in Imjin River Watershed, South Korea. Water (Switzerland), 14(5), 793. doi:10.3390/w14050793.

Giao, N. T., & Ly, N. H. T. (2023). Evaluating Surface Water Quality in a Coastal Province of Vietnamese Mekong Delta Using Water Quality Index and Statistical Methods. Polish Journal of Environmental Studies, 32(3), 2113–2124. doi:10.15244/pjoes/159897.

Le, T. Q., & Nguyen, V. K. (2022). Assessment of surface water quality and some main rivers’ capacity of receiving wastewater in Ca Mau province, Vietnam. The Journal of Agriculture and Development, 21(3), 53–66. doi:10.52997/jad.7.03.2022.

Le, T. V., Nguyen, D. T. P., & Nguyen, B. T. (2023). Spatial and temporal analysis and quantification of pollution sources of the surface water quality in a coastal province in Vietnam. Environmental Monitoring and Assessment, 195(3), 408. doi:10.1007/s10661-023-11026-x.

Hong, T. T. K., & Giao, N. T. (2022). Analysis of Surface Water Quality in Upstream Province of Vietnamese Mekong Delta Using Multivariate Statistics. Water (Switzerland), 14(12). doi:10.3390/w14121975.

Wehrheim, C., Lübken, M., Stolpe, H., & Wichern, M. (2023). Identifying Key Influences on Surface Water Quality in Freshwater Areas of the Vietnamese Mekong Delta from 2018 to 2020. Water (Switzerland), 15(7), 1295. doi:10.3390/w15071295.

Yang, W., Zhao, Y., Wang, D., Wu, H., Lin, A., & He, L. (2020). Using principal components analysis and IDW interpolation to determine spatial and temporal changes of Surface water quality of Xin’Anjiang River in Huangshan, China. International Journal of Environmental Research and Public Health, 17(8), 2942. doi:10.3390/ijerph17082942.

Nguyen, T. G. (2020). Evaluating Surface Water Quality in Ninh Kieu District, Can Tho City, Vietnam. Journal of Applied Sciences and Environmental Management, 24(9), 1599-1606. doi:10.4314/jasem.v24i9.18.

Xu, Z., Zhang, H., Guo, M., Fang, D., Mei, J., & Xie, J. (2022). Analysis of Acute Nitrite Exposure on Physiological Stress Response, Oxidative Stress, Gill Tissue Morphology and Immune Response of Large Yellow Croaker (Larimichthys Crocea). Animals, 12(14), 1791. doi:10.3390/ani12141791.

Peng, Z., Wang, J., Niu, N., Liu, A., Niu, Y., Qin, J., ... & Li, Y. (2022). The effect of PO43--P concentration on sludge settle ability and nutrients removal performance. Water Science & Technology, 86(5), 1108-1121. doi:10.2166/wst.2022.248.

Hamed, M. A. R. (2019). Application of Surface Water Quality Classification Models Using Principal Components Analysis and Cluster Analysis. SSRN Electronic Journal. doi:10.2139/ssrn.3364401.

Hong, T., Viet, L., & Giao, N. (2022). Analysis of Spatial-Temporal Variations of Surface Water Quality in the Southern Province of Vietnamese Mekong Delta Using Multivariate Statistical Analysis. Journal of Ecological Engineering, 23(7), 1–9. doi:10.12911/22998993/149854.

Giao, N. T., Trinh, L. T. K., & Nhien, H. T. H. (2021). Coastal water quality assessment in Bac Lieu province, Vietnam. Journal of Energy Technology and Environment, 3(1), 31-43. doi:10.37933/nipes.e/3.1.2020.4.

Sengupta, C., Sukumaran, D., Barui, D., Saha, R., Chattopadhyay, A., Naskar, A., & Dave, S. (2014). Water Health Status in Lower Reaches of River Ganga, India. Applied Ecology and Environmental Sciences, 2(1), 20–24. doi:10.12691/aees-2-1-3.

Trang, C. T. T., Kha, P. T., Nam, L. V., Bach, N. V., Quan, N. V., & Luu, N. T. M. (2019). Coastal Pollution loads in Mong Cai city, Quang Ninh Province. Vietnam Journal of Marine Science and Technology, 19(3A), 121-130.

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DOI: 10.28991/CEJ-2023-09-08-03


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