It depends on the municipality where the property is located. The purpose of this inspection is to verify that wastewater is not being discharged into the stormwater drainage system. This control may be mandatory if:
The municipality has issued a local decree requiring it, pursuant to Article L2224-8 of the French General Code of Local Authorities;
The property is located within a designated area affected by the 2024 Paris Olympic Games, where water quality in the Seine must be ensured for open water swimming and triathlon events. In this case, the inspection is required under Law No. 2021-1104 of 22 August 2021 and Decree No. 2022-93 of 31 January 2022, which lists the concerned municipalities.