1. Goncharuk, V.V., Features of water origin on the planet Earth. New approaches to the assessment of water quality, J. Water Chem. Technol., 2018, vol. 40, no. 1, pp. 1–10.
2. ISO 24510:2007: Activities Relating to Drinking Water and Wastewater Services—Guidelines for the Assessment and for the Improvement of the Service to Users, Geneva: Int. Stand. Org., 2007.
3. ISO 24511:2007: Activities Relating to Drinking Water and Wastewater Services—Guidelines for the Management of Wastewater Utilities and for the Assessment of Wastewater Services, Geneva: Int. Stand. Org., 2007.
4. ISO 24512:2007: Activities Relating to Drinking Water and Wastewater Services—Guidelines for the Management of Drinking Water Utilities and for the Assessment of Drinking Water Services, Geneva: Int. Stand. Org., 2007.
5. GOST (State Standard) 31952-2012: Water Treatment for Units. General Requirements and Methods of Efficiency Determination, Moscow: Standartinform, 2014.