Regulation No. 57 of 2011 of Minister of the Environment on the Requirements for laboratories testing the physico-chemical and chemical parameters of water, for the analyses performed as part of those tests and for quality assurance of laboratory operations, and the analysis reference methods

The Regulation lays down requirements for laboratories testing the physicochemical and chemical parameters of water and for quality assurance of their operations; requirements for the quality of analyses performed as part of tests of the physico-chemical and chemical parameters of water; and analysis reference methods. Laboratories testing the physico-chemical and chemical parameters of water must meet the following requirements: (1) they must be accredited in accordance with the EVS EN ISO/IEC 17025 standard; (2) they must be accredited to use the appropriate methods of analysis (including laboratory, field and online methods); (3) they must have undergone the required interlaboratory comparative tests once a year.