Communes all or part of whose territory is included in a sanitation agglomeration whose populations and economic activities produce wastewater with a gross organic pollution load of more than 120 kg per day must be equipped, for the relevant part of their territory, with a wastewater collection system.
An order by the ministers responsible for health and the environment sets the minimum technical requirements to ensure that wastewater collection and transport are effective without excessive cost, as are the measures taken to limit pollution peaks, particularly those caused by heavy rain.