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Classifying arsenic-contaminated waters in Tarkwa: a machine learning approach

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Abstract

Access to clean and safe drinking water is key to the improvement of social lives in most developing countries. Due to its hazardous nature and detrimental effects on human health, increased quantities of arsenic in water bodies have been a growing global health concern in recent years. In Ghana, elevated arsenic concentration is reported in some waters in Tarkwa. However, constant monitoring of arsenic concentrations in these water sources are inhibited by the associated huge expenses. To facilitate early detection, this study aimed at developing efficient machine learning models for classifying high, medium and low levels of arsenic contamination using physical water parameters, such as total dissolved solids, pH, electrical conductivity and turbidity. These parameters were selected, because they are relatively inexpensive to measure, their data were available and they may influence the concentration of arsenic in the water. Thus, three machine learning models, namely, extra trees, random forest and decision tree, were developed and assessed using evaluation metrics, such as accuracy, precision and sensitivity. The evaluation results justified the superiority of the extra trees and random forest models over decision tree. However, all developed machine learning models generally gave remarkable performance when classifying waters with high and low levels of arsenic contamination. Moreover, the variable importance analysis revealed that pH had the strongest influence in classifying arsenic contaminated waters followed by electrical conductivity. The outcome of the study has revealed the potency of machine learning algorithms in assisting water monitoring practitioners for monitoring arsenic concentration in water sources.

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Data availability

The data sets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors wish to thank the management of University of Mines and Technology for providing data for the modeling.

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The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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  1. Department of Environment and Sustainability Sciences, Faculty of Natural Resources and Environment, University for Development Studies, Tamale, Ghana

    Mohammed Ayisha & Dzigbodi Adzo Doke

  2. School of Built Environment, University of Environment and Sustainable Development, Somanya, Ghana

    Matthew Nkoom

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  1. Mohammed Ayisha
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Ayisha, M., Nkoom, M. & Doke, D.A. Classifying arsenic-contaminated waters in Tarkwa: a machine learning approach. Sustain. Water Resour. Manag. 10, 55 (2024). https://doi.org/10.1007/s40899-024-01042-1

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