Abstract
The article continues a series of works devoted to two closely related aspects of water quality management in natural objects and water utilization – ensuring the reliability of water quality assessment and optimizing of its standardization. It was shown that the risks of false conclusions equally arise both when setting a standard – the maximum permissible concentration of pollutants in a water body, and when monitoring compliance with established requirements. It was demonstrated on specific examples that in both cases, depending on the method of the research error registration, opposite conclusions concerning the water quality can be obtained. To obtain scientifically based results, a risk-oriented approach, as well as the statistical methods that use loss functions in various modifications are required. A solution to the problem of assessing the reliability of determining the water quality class on the example of a typical challenge of industrial water use was provided, recommendations on the arbitration method in connection with the assessment of the correctness of the water attributing to restrictive standards were also proposed.
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