Original Papers
Vol. 15 No. 3 (2026)
Assessment of groundwater quality using GWQI and an AHP-Developed Health-Risk-Oriented Index (HR-GWQI): evidence from the Mitidja Plain (Algeria)
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All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.
Published: 30 September 2026
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Groundwater quality assessment in the alluvial aquifer system of the Mitidja Plain during the 2019 low-water period was conducted using an integrated approach combining the conventional Groundwater Quality Index (GWQI) with an innovative Human Risk-Groundwater Quality Index (HR-GWQI) developed through Analytic Hierarchy Process (AHP) weighting and GIS-based spatial analysis. Based on eleven physicochemical parameters and data from 23 monitoring wells, the study revealed that natural mineralization driven by carbonate and evaporite dissolution together with seawater intrusion controls the general ionic composition, whereas nitrate contamination of agricultural origin constitutes the main health concern, with 43.5% of samples exceeding the WHO guideline value of 50.0 mg/L. Although the conventional GWQI classified most wells as suitable for drinking purposes, it underestimated nitrate-related health risks due to the uniform weighting of parameters. In contrast, the HR-GWQI, which assigns greater importance to nitrate concentrations through AHP-derived weighting, provided a more realistic and health-protective classification of groundwater quality by reclassifying several contaminated wells into lower quality categories. A sensitivity analysis further confirmed that the HR-GWQI is most robust in the wells with the highest nitrate burden, an emergent property of the AHP health-risk-oriented weighting scheme. GIS-based spatial distribution mapping of the monitoring points further revealed that the most significant groundwater quality deterioration is concentrated in the northeastern coastal zone and the western sectors of the plain, areas strongly affected by agricultural pressure and saline intrusion. These findings demonstrate that the HR-GWQI represents a more effective tool for groundwater quality evaluation and health-risk-oriented management in nitrate-contaminated aquifer systems across North Africa and the Mediterranean Basin.
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Abdessamed, D., Jodar-Abellan, A., Ghoneim, S. S., Almaliki, A., Hussein, E. E., & Pardo, M. Á. (2023). Groundwater Quality Assessment for Sustainable Human Consumption in Arid Areas Based on GIS and Water Quality Index in the Watershed of Ain Sefra (SW of Algeria). Environmental Earth Sciences, 82(21), 510. DOI: https://doi.org/10.1007/s12665-023-11183-9
Akter, T., Jhohura, F. T., Akter, F., Chowdhury, T. R., Mistry, S. K., Dey, D., Barua, M. K., Islam, M. A., & Rahman, M. (2016). Water Quality Index for Measuring Drinking Water Quality in Rural Bangladesh: A Cross-Sectional Study. Journal of Health, Population, and Nutrition, 35(4). https://doi.org/10.1186/s41043-016-0041-5 DOI: https://doi.org/10.1186/s41043-016-0041-5
Aymé, A. 1952. Le Quaternaire littoral des environs d’Alger “The coastal Quaternary of the Algiers area”, Actes du Congrès Panafricain de la préhistoire, Alger, II session, pp. 243-246.
Aziez, O., Djoudar Hallal, D., Khelfi, M.E.A., Leulmi S., Mahleb, T.M., Aouar F., Saoudi O., Khous D., Remini B., & Habi M. (2025). Integrated Assessment Of Groundwater Quality In The Mitidja Plain (Algeria) Using Moran’s I Spatial Analysis, Groundwater Pollution Index, And Entropy-Weighted Water Quality Index In Support Of Artificial Recharge Planning. Acque Sotterranee - Italian Journal Of Groundwater, 14(3). https://doi.org/10.7343/as-2025-893 DOI: https://doi.org/10.7343/as-2025-893
Badihi, A., Jahangiri-Rad, M., Mahmoudkhani, R., & Kashi, G. (2023). Water Quality Indices Appraisal And Health Risk Assessment Of Nitrate, Mercury, and Lead in Water Distribution Network: A Case Study of Robat Karim in Tehran, Iran. Environmental Quality Management, 32(3), 275-285. https://doi.org/10.1002/tqem.21914 DOI: https://doi.org/10.1002/tqem.21914
Benadela, L., & Bekkousa, B. (2025). Hybrid Assessment Of Groundwater Quality Using Fuzzy Logic And Conventional Indices In Sidi Kada Mountains (Algeria). Journal of Degraded and Mining Lands Management. https://doi.org/10.15243/jdmlm.2025.125.8821 DOI: https://doi.org/10.15243/jdmlm.2025.125.8821
Benmarce, K., Zighmi, K., Hadji, R., Hamed, Y., Gentilucci, M., Barbieri, M., & Pambianchi, G. (2024). Integration Of GIS And Water-Quality Index For Preliminary Assessment Of Groundwater Suitability For Human Consumption And Irrigation In Semi-Arid Region. Hydrology, 11(5), 71. https://doi.org/10.3390/hydrology11050071 DOI: https://doi.org/10.3390/hydrology11050071
Betrouni, M. 1983. Le Pléistocène supérieur du littoral ouest algérois “The Upper Pleistocene of the western Algiers coastline”. Thèse 3e cycle, Université d'Aix-Marseille, 52 fig., XIII pl. h.t., 202 p.
Bisen, U., & Singh, S. P. (2026). Multicriteria Groundwater Quality Assessment Using AHP-GIS Integration of Physicochemical and Geohydrological Parameters in the Bundelkhand Region, India. Habitable Planet, 2(1), 216-233. https://doi.org/10.63335/j.hp.2026.0036. DOI: https://doi.org/10.63335/j.hp.2026.0036
Boufekane, A., Meddi, H., & Meddi, M. (2020). Delineation Of Groundwater Recharge Zones In The Mitidja Plain, North Algeria, Using Multi-Criteria Analysis. Journal Of Hydroinformatics, 22(6), 1468–1484. https://doi.org/10.2166/hydro.2020.097 DOI: https://doi.org/10.2166/hydro.2020.082
Boufekane, A., Yahiaoui, S., Meddi, H., Meddi, M., & Busico, G. (2022). Modified DRASTIC Index Model For Groundwater Vulnerability Mapping Using Geostatistic Methods And GIS In The Mitidja Plain Area (Algeria). Environmental Forensics, 23(5–6), 539–556. https://doi-org.www.sndl1.arn.dz/10.1080/15275922.2021.1913674 DOI: https://doi.org/10.1080/15275922.2021.1913674
Brown, R. M., Mcclelland, N. I., Deininger, R. A., & Tozer, R. G. (1970). A Water Quality Index: Do We Dare? Water And Sewage Works, 117(10), 339-343.
Djediat, Y. 1996. Étude géologique et géotechnique de la Mitidja nord orientale “Geological and geotechnical study of the north-eastern Mitidja. Thèse de Magistère Univ. des Sci. et de la Tech. d’Alger, 33 fig., 3 pl. h.t., 106 p.
Djediat, Y., Yelles Chaouche, A., & Semroud, B. (2011). Déformations synsédimentaires quaternaires dans les terrasses marines du littoral algérois (Algérie centrale), “Quaternary synsedimentary deformations in the marine terraces of the Algiers coastline (central Algeria)”. Bull. Serv. Géol., vol. 22, n° 3, pp. 299-313.
Escobar, M. T., Aguaron, J., & Moreno-Jimenez, J. M. (2004). A Note On AHP Group Consistency For The Row Geometric Mean Priorization Procedure. European Journal Of Operational Research, 153(2), 318-322. https://doi.org/10.1016/s0377-2217(03)00166-0. DOI: https://doi.org/10.1016/S0377-2217(03)00154-1
Ferdjouni, N. E. H., Djoudar Hallal, D., Aziez, O., & Khelfi, M. E. A. (2025). Assessment Of The Spatiotemporal Evolution Of The Groundwater Quality Using The WQI And Trend Analysis In The Eastern Mitidja Plain (North Of Algeria). Environmental Science And Pollution Research International, 32(10), 5936–5954. https://doi.org/10.1007/s11356-025-36070-7 DOI: https://doi.org/10.1007/s11356-025-36070-7
Gad M, Gaagai A, Eid MH, Szűcs P, Hussein H, Elsherbiny O, Elsayed S, Khalifa MM, Moghanm FS, Moustapha ME, Et Al. (2023). Groundwater Quality And Health Risk Assessment Using Indexing Approaches, Multivariate Statistical Analysis, Artificial Neural Networks, And GIS Techniques In El Kharga Oasis, Egypt. Water 15(6):1216. https://doi.org/10.3390/w15061216 DOI: https://doi.org/10.3390/w15061216
Glangeaud, L., aymé, A., caire, A., mattauer, M. Et muraour, P. 1952. Histoire géologique de la province d’Alger “Geological history of the Algiers province”, Publ. XIX C.G.I., Alger, Mono. rég., 1° série, Algérie, 25, 40 figs., 3 pl. h.t., 142 p.
Horton, R. K. (1965). An Index Number System For Rating Water Quality. Journal Of The Water Pollution Control Federation, 37(3), 300-306.
Houari, I. M., Bouselsal, B. & Lakhdari, A. S. (2024). Evaluating Groundwater Potability And Health Risks From Nitrates In The Semi-Arid Region Of Algeria. Ecological Engineering & Environmental Technology, 25(6), 219–233. https://doi.org/10.12912/27197050/186954 DOI: https://doi.org/10.12912/27197050/186954
Jha, M. K., Shekhar, A., & Jenifer, M. A. (2020). Assessing Groundwater Quality For Drinking Water Supply Using Hybrid Fuzzy-GISBased Water Quality Index. Water Research, 179, 115867. https://doi.org/10.1016/j.watres.2020.115867 DOI: https://doi.org/10.1016/j.watres.2020.115867
Official Journal Of The Algerian People’s Democratic Republic (JORA). (2011). Executive Decree No. 11-125 Of 17 Rabie Ethani 1432 Corresponding To March 22, 2011 Relating To The Quality Of Water For Human Consumption. Official Journal Of The Algerian People’s Democratic Republic, No. 13.
Kada, H., Kouadra, R., Aouati, H., & Demdoum, A. (2025). Groundwater Quality And Human Health Risks In The Setifian High Plains, Algeria. Environmental Geochemistry And Health, 47(12), 558. https://doi.org/10.1007/s10653-025-02875-1 DOI: https://doi.org/10.1007/s10653-025-02875-1
Khelfi, M. E. A., Djoudar Hallal, D., Guastaldi, E., Alili, M. & Nadri, M. (2025). Assessment Of The Vulnerability And Sensitivity Of Groundwater For Drinking Water Supply And Irrigation: The Case Of The Mitidja Alluvial Aquifer (Northern Algeria). Geomatics, Land Management and Landscape, (1). https://doi.org/10.15576/gll/200413 DOI: https://doi.org/10.15576/GLL/200413
Minh, H. V. T., Avtar, R., Kumar, P., Tran, D. Q., Ty, T. V., Behera, H. C., & Kurasaki, M. (2019). Groundwater Quality Assessment Using Fuzzy-AHP In An Giang Province Of Vietnam. Geosciences, 9(8), 330. https://doi.org/10.3390/geosciences9080330 DOI: https://doi.org/10.3390/geosciences9080330
Naz, I., Ahmad, I., Aslam, R. W., Quddoos, A., & Yaseen, A. (2024). Integrated Assessment And Geostatistical Evaluation Of Groundwater Quality Through Water Quality Indices. Water, 16(1), 63. https://doi.org/10.3390/w16010063 DOI: https://doi.org/10.3390/w16010063
Nemer, A., Benhassine, M., & Belhai, M. (2023). Hydrogeochemical And Isotopic Assessment For Characterizing Groundwater Quality In The Mitidja Plain (Northern Algeria). Environmental Science And Pollution Research, 30(25), 67775–67791. https://doi.org/10.1007/s11356-023-27952-9
Rajkumar, H., Naik, P. K., & Rishi, M. S. (2022). A comprehensive water quality index based on the analytical hierarchy process. Ecological Indicators, 145, 109582. https://doi.org/10.1016/j.ecolind.2022.109582 DOI: https://doi.org/10.1016/j.ecolind.2022.109582
Saaty, T. L. (1977). A Scaling Method For Priorities In Hierarchical Structures. Journal Of Mathematical Psychology, 15(3), 234-281. https://doi.org/10.1016/0022-2496(77)90033-5 DOI: https://doi.org/10.1016/0022-2496(77)90033-5
Saaty, T. L. (1980). The Analytic Hierarchy Process: Planning, Priority Setting, Resource Allocation. Mcgraw-Hill. DOI: https://doi.org/10.21236/ADA214804
Saaty, T. L. (1987). The Analytic Hierarchy Process - What It Is And How It Is Used. Mathematical Modelling, 9(3-5), 161-176. DOI: https://doi.org/10.1016/0270-0255(87)90473-8
Saaty, T. L. (1990). How To Make A Decision: The Analytic Hierarchy Process. European Journal Of Operational Research, 48(1), 9-26. https://doi.org/10.1016/0377-2217(90)90057-i DOI: https://doi.org/10.1016/0377-2217(90)90057-I
Saaty, T. L. (2003). Decision-Making With The AHP: Why Is The Principal Eigenvector Necessary? European Journal Of Operational Research, 145(1), 85-91. https://doi.org/10.1016/s0377-2217(02)00227-8 DOI: https://doi.org/10.1016/S0377-2217(02)00227-8
Sadat-Noori, S. M., Ebrahimi, K., & Liaghat, A. M. (2014). Groundwater Quality Assessment Using The Water Quality Index And GIS In Saveh-Nobaran Aquifer, Iran. Environmental Earth Sciences, 71(9), 3827-3843. https://doi.org/10.1007/s12665-013-2759-6 DOI: https://doi.org/10.1007/s12665-013-2770-8
Sanad, H., Mouhir, L., Zouahri, A., Moussadek, R., El Azhari, H., Yachou, H., Ghanimi, A., Oueld Lhaj, M., & Dakak, H. (2024). Assessment Of Groundwater Quality Using The Pollution Index Of Groundwater (PIG), Nitrate Pollution Index (NPI), Water Quality Index (WQI), Multivariate Statistical Analysis (MSA), And GIS Approaches: A Case Study Of The Mnasra Region, Gharb Plain, Morocco. Water, 16(9), 1263. https://doi.org/10.3390/w16091263 DOI: https://doi.org/10.3390/w16091263
Selmane, T., Dougha, M., Djerbouai, S., Djemiat, D., & Lemouari, N. (2023). Groundwater Quality Evaluation Based On Water Quality Indices (WQI) Using GIS: Maadher Plain Of Hodna, Northern Algeria. Environmental Science And Pollution Research International, 30(11), 30087-30106. https://doi.org/10.1007/s11356-022-24338-1 DOI: https://doi.org/10.1007/s11356-022-24338-1
World Health Organization. (2017). Guidelines For Drinking-Water Quality: Fourth Edition Incorporating The First Addendum. World Health Organization. https://www.who.int/publications/i/item/9789241549950
Yahiaoui, S., Meddi, M., Razack, M., Boufekane, A., & Bekkoussa, B. S. (2023). Hydrogeochemical And Isotopic Assessment For Characterizing Groundwater Quality In The Mitidja Plain (Northern Algeria). Environmental Science And Pollution Research International, 30(33), 80029–80054. https://doi.org/10.1007/s11356-023-27952-9 DOI: https://doi.org/10.1007/s11356-023-27952-9
Yassini, I. 1973. Nouvelles données stratigraphiques et microfaunistiques sur la limite Pliocène inférieur - Pliocène moyen (Plaisancien Astien) dans la région d’Alger “New stratigraphic and microfaunal data on the Lower Pliocene – Middle Pliocene boundary (Piacenzian Zanclean) in the Algiers region. Rev. micropaléonto., 16(4), pp. 229-248.
How to Cite
Assessment of groundwater quality using GWQI and an AHP-Developed Health-Risk-Oriented Index (HR-GWQI): evidence from the Mitidja Plain (Algeria). (2026). Acque Sotterranee - Italian Journal of Groundwater, 15(3). https://doi.org/10.7343/as-2026-1018
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