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TC 224: Service activities relating to drinking water supply systems and wastewater systems - Quality criteria of the service and performance indicators
(���/�� 224 ������, ��������� � ������������� ������ ������ �������� ���� � ������ ������ ������� ��� - �������� �������� ����� � ���������� ��������)

TC 224: Service activities relating to drinking water supply systems and wastewater systems - Quality criteria of the service and performance indicators (���/�� 224 ������, ��������� � ������������� ������ ������ �������� ���� � ������ ������ ������� ��� - �������� �������� ����� � ���������� ��������):

- ISO 24510 Activities relating to drinking water and wastewater services -- Guidelines for the assessment and for the improvement of the service to users

- ISO 24511 Activities relating to drinking water and wastewater services -- Guidelines for the management of wastewater utilities and for the assessment of wastewater services

- ISO 24512 Activities relating to drinking water and wastewater services -- Guidelines for the management of drinking water utilities and for the assessment of drinking water services