Special Issues

Listed below is a list of selected special articles.

Articles by Year

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An Innovative Low-Cost Method of Water Quality Analysis with Spectrophotometry and Machine Learning

January 30, 2023

This study seeks to solve the lack of low-cost, accurate water quality measuring tools by creating an inexpensive spectrophotometer utilizing a smartphone for the measurement of various water contaminants. The device consists of a mount, LEDs, and a smartphone, and uses advanced software tools, including machine learning, for data processing, analysis, and contaminant concentration prediction. The machine learning models were trained on 2,282 prepared test samples and 15 gathered field samples from eight sources, which were separately tested using standard techniques. The overall device and analysis software was then evaluated using eight separate testing samples from eight different locations, and was used to conduct a proof-of-concept mini-study where samples taken at various distances from a drainage pipe were analyzed. Overall, the predictive system reached an accuracy of 83.3%, cost $29.14, and was able to be completed in under three minutes by each of three volunteers. The main conclusion of this work is that the system developed is cheap, effective, and easy to use, providing a template for future mass production and better testing of water quality worldwide.

Keywords: Water Quality Analysis, Spectrophotometry, Machine Learning,  SVM algorithm, Multivariate Multiple Regression


  1. Chowdhary, P, Bharagava, RN, Mishra, S, Khan, N (2019). Role of Industries in Water Scarcity and Its Adverse Effects on Environment and Human Health. Environmental Concerns and Sustainable Development 1, 235-256. 

  2. Lin, L, Yang, H, Xu, X (2022). Effects of Water Pollution on Human Health and Disease Heterogeneity: A Review. Frontiers in Environmental Science 10, 880246. 

  3. Khatri, N, Tyangi, S (2014). Influences of natural and anthropogenic factors on surface and groundwater quality in rural and urban areas. Frontiers in Life Science 8, 23-39.

  4. Boelee, E, Geerling, G, Zann, Bvd, Blauw, A, Vethaak, AD (2019). Water and health: From environmental pressures to integrated responses. Acta Tropica 193, 217-226.

  5. Ella, EMAE, Elnazer, AA, Salman, SA (2017). The effect of human activities on the pollution of water in southwest Giza area, Egypt. Water Supply 17, 1368-2376.

  6. Karthe, D, Chalow, S, Borchardt, D (2014). Water resources and their management in central Asia in the early twenty first century: status, challenges and future prospects. Environmental Earth Sciences 73, 487-499. 

  7. Altenburger, R, Brack, W, Burgess, RM, et al (2019). Future water quality monitoring: improving the balance between exposure and toxicity assessments of real-world pollutant mixtures. Environmental Sciences Europe 31, 12. 

  8. Kirschke, S, Avellán, T, Bärlund, I, et al (2020). Capacity challenges in water quality monitoring: understanding the role of human development. Environmental Monitoring Assessment 5, 192-298.

  9. United Nations Sustainable Development Goals. https://www.un.org/sustainabledevelopment/sustainable-development-goals/ (accessed Dec 2022)

  10. Kriss, R, Pieper, KJ, Parks, J, Edwards, MA (2021). Challenges of Detecting Lead in Drinking Water Using at-Home Test Kits. Environmental Science Technology 55, 1964-1972. 

  11. Hamoudi, A, Jeuland, M, Lombardo, S et al (2012). The Effect of Water Quality Testing on Household Behavior: Evidence from an Experiment in Rural India. The American Journal of Tropical Medicine and Hygiene 87, 18-22. 

  12. Norris, RH, Georges, A (1986). Design and Analysis for Assessment of Water Quality. In Limnology in Australia. (ed. Decker, PD, Williams, WD), pp. 555-572. Springer, Dordrecht, Germany. 

  13. Jordan, P, Cassidy, R (2022). Perspectives on Water Quality Monitoring Approaches for Behavioral Change Research. Frontiers in Water 4, 917595.

  14. Soltani, AA, Oukil, A, Boutaghane, H, et al (2021). A new methodology for assessing water quality, based on data envelopment analysis: Application to Algerian Dams. Ecological Indicators 121, 106952. 

  15. Luvhimbi, N, Tshitangano, TG, Mabunda, JT, et al (2022). Water quality assessment and evaluation of human health risk of drinking water from source to point of use at Thulamela municipality, Limpopo Province. Scientific Reports 12, 6059.