EVS-EN 16941-1:2018

This European Standard specifies the requirements and gives recommendations for the design, sizing, installation, identification, commissioning and maintenance of rainwater harvesting systems for the use of rainwater on-site as non-potable water. This European Standard also specifies the minimum requirements for these systems.
Excluded from the scope of this European Standard are:
—  the use as drinking water and for food preparation;
—  the use for personal hygiene purposes;
—  decentralized attenuation;
—  infiltration.
NOTE  Conformity with the standard does not exempt from compliance with the obligations arising from local or national regulations.