Occurrence, Health Risk and Source Apportionment of Polycyclic Aromatic Hydrocarbons in Borehole Water Around Fuel Stations in Owerri West Local Government Area, Imo State, Nigeria

Dike Chinyere L.1; Oze R. N.1; Bilar A.1; Anozie R.C.; Obiagwu I.C.; Nkwuda A.

doi:10.56201/ijccp.vol.12.no5.2026.pg103.110

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Occurrence, Health Risk and Source Apportionment of Polycyclic Aromatic Hydrocarbons in Borehole Water Around Fuel Stations in Owerri West Local Government Area, Imo State, Nigeria

Dike Chinyere L.1, Oze R. N.1, Bilar A.1, Anozie R.C., Obiagwu I.C., Nkwuda A.

Abstract

Borehole water is a major drinking water source in Owerri West LGA, Imo State, Nigeria, but fuel stations within residential areas raise concerns over groundwater contamination by polycyclic aromatic hydrocarbons . This study assessed concentrations of the 16 USEPA priority PAHs in borehole water near three fuel stations (Nekede, Orogwe, Obinze), evaluated health risks to adults and children, and identified probable contamination sources. Twenty-seven samples were collected in the dry season from fuel-station and nearby residential boreholes (25–625 m away). Physicochemical parameters were analyzed per APHA (2017); PAHs were extracted (USEPA Method 3510C) and quantified by GC-MS. Health risk was assessed using the USEPA (2014) deterministic model, with source apportionment via diagnostic ratios and PCA. All physicochemical parameters met WHO/USEPA limits. Total PAHs (Σ16PAHs) ranged from 0.112–0.217 mg/L, with benzo(a)pyrene exceeding the USEPA limit (0.01 μg/L) in all fuel-station boreholes. Hazard quotients were below 1, but benzo(a)pyrene cancer risk (7.15×10−5 adults;

Keywords

Polycyclic aromatic hydrocarbons; Borehole water; Health risk assessment; Fuel stations; Groundwater contamination; Owerri West

References

Adeyi, A. A., Babalola, B. A., & Olayinka, K. O. (2017). Polycyclic aromatic hydrocarbons in borehole water around dumpsites in Lagos, Nigeria. Environmental Monitoring and Assessment, 189(6), 1-12. Andrade, A. D., Baird, W. M., & Freire, R. S. (2008). Polycyclic aromatic hydrocarbons: Sources, effects, and regulations. Journal of Environmental Management, 86(3), 569-580. APHA (2017). Standard Methods for the Examination of Water and Wastewater (23rd ed.). American Public Health Association. Darko, G., Akoto, O., & Ephraim, J. H. (2017). Occurrence of polycyclic aromatic hydrocarbons in borehole water from selected fuel station areas in Kumasi, Ghana. Bulletin of Environmental Contamination and Toxicology, 98(4), 523-528. Feng, J., Yang, Z., & Niu, J. (2007). Source apportionment of PAHs using PCA. Atmospheric Environment, 41(35), 7676-7686. García, R. D., Díaz, M. C., & Sosa, V. (2018). PAH contamination in groundwater near petroleum facilities in developing countries. Science of the Total Environment, 628, 139-148. International Agency for Research on Cancer (2010). Some non-heterocyclic polycyclic aromatic hydrocarbons and some related exposures (IARC Monographs Vol. 92). IARC. Li, X., Zhang, Y., & Wang, F. (2019). Source identification of PAHs using PCA and cluster analysis. Chemosphere, 219, 123-132. Malik, A., Verma, P., & Singh, M. (2011). Source apportionment of PAHs by multivariate methods. Environmental Monitoring and Assessment, 178(1-4), 57-67. Mallah, M. A., Chang, F., & Luo, Z. (2022). Polycyclic aromatic hydrocarbons in the environment: A review on occurrence, sources, fate, and toxicity. Environmental Pollution, 292, 118314. Osei, E. M., Akoto, O., & Darko, G. (2016). Groundwater quality assessment in rural communities of Ghana. Journal of Water and Health, 14(4), 639-647. Standards Organization of Nigeria (2015). Nigerian Standard for Drinking Water Quality (NIS 554:2015). SON. United States Environmental Protection Agency (2014). Risk Assessment Guidance for Superfund Volume I: Human Health Evaluation Manual, Part A. EPA/540/1-89/002. United States Environmental Protection Agency (1996). Method 3510C: Separatory Funnel Liquid-Liquid Extraction. EPA. World Health Organization (2011). Guidelines for Drinking-water Quality (4th ed.). WHO. Zhang, Y., Tao, S., & Shen, H. (2018). Inhalation and dermal exposure to PAHs in urban and rural areas of Northern China. Atmospheric Environment, 191, 335-343.

Occurrence, Health Risk and Source Apportionment of Polycyclic Aromatic Hydrocarbons in Borehole Water Around Fuel Stations in Owerri West Local Government Area, Imo State, Nigeria

Abstract

Keywords

References

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