Regulation/GM/NoRegulation/GM/No. 0013 of 15 January 1976 The State Minister of the Interior, at the proposal of the SpecialSecretariat for the Environment, in exercise of the powers conferred upon himby Decree No. 73.030, of 30 October 1973, Decree-Law No. 1.413, of 14 August1975, and Decree No. 76.389, of 3 October 1975; Whereas the need to classify domestic water courses is essential forthe protection of their quality, which is measured using determined parameters; Whereas the costs for the control of pollution may be moreproportionate when the required quality, for a given water course or for itsvarious stretches, is in accordance with the preponderant use to be given tosame; Whereas the classification of domestic bodies of water must be basednot necessarily on their current condition, but on the parameters which theymust possess in order to meet the needs of the community; RESOLVES to establish the following classification of domesticwaters in the National Territory: I. The d...