Article R2224-19-4 of the French General Code of Local Authorities
Any person required to connect to the sewerage system and who obtains all or part of their water supply from a source that is not part of a public service must declare this to the town hall. In the event that the use of this water generates the discharge of wastewater collected by the sanitation service, the collective sanitation fee is calculated: – either by direct measurement using metering devices…