Water is the most crucial factor for all living organisms, so it is essential to protect it. And water quality monitoring is one of the first steps required in the rational development and management of water resources. Smart systems used for real-time quality control and power consumption are rapidly developing. Their implementation in water quality assurance systems is essential and actual. The three-level smart system presented in this article involves the processing of water samples testing results from water supply sources, from the distribution network (consumers), test results of testing laboratories, and data from water consumption accounting systems. Transmission of the obtained results to consumers applying wireless communication technologies is an important system feature.
 I.V. Plachkov, "Elektroenerhetyka ta okhorona navkolyshnoho seredovyshcha. Funktsionuvannia enerhetyky v suchasnomu sviti" in Enerhetyka: istoriia, suchasnist i maibutnie, I.V Plachkov, Eds. [Online]. Available: http://energetika.in.ua/ua/books/book-5/part-4/section-3.
 S. Geetha and S. Gouthami, "Internet of things enabled real-time water quality monitoring system," Smart Water, vol. 2, no. 1, pp. 1- 19, 2016, DOI: 10.1186/s40713-017- 0005-y.
 L. Zhenan, W. Kai, L. Bo, "Sensor-Network based Intelligent Water Quality Monitoring and Control", International Journal of Advanced Research in Computer Engineering Technology, Volume 2, Issue 4, pp. 1659-1662, April 2013. [Online]. Available: https://www.slideshare.net/ IjarcetJournal/ijarcet-vol2issue416591662
 J. Okache, B. Haggett and T. Ajmal, "Wireless Sensor Networks For Water Monitoring", International Journal of Digital Information and Wireless Communications (IJDIWC), vol. 4315, pp. 349360, November 2012.
 S. Silva, H.N. Nguyen, V. Tiporlini, K. Alameh, "Web Based Water Quality Monitoring with Sensor Network: Employing ZigBee and WiMax Technologies". In Proceedings of the 8th International Conference on Highcapacity Optical Networks and Emerging Technologies, Riyadh, Saudi Arabia, pp. 138-14219, December 2011.
 M.N. Barabde, S.R. Danve, "A Review on Water Quality Monitoring System", International Journal of VLSI and Embedded Systems-IJVES, Vol. 06, pp. 1475-1479, March 2015. DOI: 10.15680/ijircce.2015.0306016
 M.K. Amruta and M.T. Satish, "Solar powered water quality monitoring system using a wireless sensor network", In Proc. of International Multi-Conference on Automation, Computing, Communication, Control and Compressed Sensing (iMac4s). IEEE, Kottayam, pp. 281-285, 2013. DOI:http://dx.doi.org/10.1109/iMac4s.2013.6526423
 Sh.S. Palwe, J.D. Bhosale, "The Real-Time Water Quality Monitoring System Based On IoT Platform", Computer Science. International journal of scientific research in science, engineering, and technology, Vol. 4, pp. 434-442, 2018. DOI: 10.15680/ijircce.2015.0306016 [Online]. Available: https://www.semanticscholar.org/paper.
 Voda pytna. Vymohy ta metody kontroliuvannia yakosti. DSTU 7525:2014, Minekonomrozvytku Ukrainy, Kyiv, Ukraina, 2014, 30 p.
 Ultrasonic smart water meter working principle. [Online]. Available: http://www.haccom.cn/en/product-1566-52313- 183268.html
 O.Y. Gonsor "Vybir instrumentiv vizualizatsii danykh v smart-systemi dlia monitorynhu yakosti vody", Grail of Science, Vol. 11, pp. 254-256, 2021. DOI: 10.36074/grailof-science.24.12.2021.042. [Online]. Available: https://ojs.ukrlogos.in.ua/index.php/grail-ofscience/issue/view/24.12.20...