ISO 24521:2016 provides guidance for the management of basic on-site domestic wastewater services, using appropriate technologies in their entirety at any level of development.
ISO 24521:2016 supplements and is intended to be used in conjunction with ISO 24511. It includes the following:
� guidelines for the management of basic on-site domestic wastewater services from the operator's perspective, including maintenance techniques, training of personnel and risk considerations;
� guidelines for the management of basic on-site domestic wastewater services from the perspective of users;
� guidance on the design and construction of basic on-site domestic wastewater systems;
� guidance on planning, operation and maintenance, and health and safety issues.
The following are outside the scope of ISO 24521:2016:
� limits of acceptability for wastewater discharged into a receiving body;
� analytical methods;
� the management structure of sanitary waste/wastewater service activities of operation and management;
� the content of contracts or subcontracts.
ISO 24521:2016 is applicable to both publicly and privately operated basic on-site domestic wastewater (black and grey water) services, for one or more dwellings.
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