Improvement of water quality control to guarantee qualifying health and hygiene requirement

The results of water quality assessment obtained by an independent body of sanitary and hygienic state supervision and the supplier enterprise often differ, despite the fact that their chemical analytical laboratories have passed the procedure of official confirmation of compliance in a single accreditation system. Therefore, the task of establishing the most plausible estimate is urgent. It is shown that in the case of compatibility of the measurements their arithmetic mean value should be used, and in the case of their incompatibility reference laboratory to have to be involved