This Regulation of the Minister of Marine Economy and Inland Navigation, which is composed of eight articles and four Annexes, lays down: (1) requirements for surface waters used for human consumption purposes; (2) frequency of water testing, methods of analysis and evaluation to verify if requirements are met. Three categories of water quality are defined: (A1) simple physical treatment required (in particular filtration and disinfection); (A2) typical physical and chemical treatment required; (A3) advanced physical and chemical treatment required. Requirements for the above categories are specified in Annex 1.