Description: Question the quality and safety of drinking water worries today as experts, and the entire population of Ukraine. One of the elements of quality of drinking water system is the operation of testing laboratories, which conduct research of drinking water in order to verify compliance with the requirements of regulatory documents (ND). In this regard, the role of confidence in the results obtained testing organizations. Such trust is formed in the process of constant demonstration laboratories of their competence and reliability of the data obtained in accordance with the officially recognized mechanisms.
Keywords: testing laboratory, interlaboratory comparative tests, test results, quality assessment, drinking water