The municipalities or their public cooperation establishments delimit, after a public enquiry carried out in accordance with Chapter III of Title II of Book I of the Environment Code:
1° Collective sanitation areas where they are required to ensure the collection of domestic wastewater and the storage, treatment and discharge or reuse of all the water collected;
2° Non-collective sanitation areas where they are required to ensure the inspection of these installations and, if they decide to do so, the treatment of empties and, at the request of the owners, the maintenance and work to build and rehabilitate non-collective sanitation installations;
3° Areas where measures must be taken to limit soil sealing and to control the flow and run-off of rainwater and run-off;
4° Areas where it is necessary to provide facilities to ensure the collection, possible storage and, where necessary, treatment of rainwater and run-off when the pollution it brings to the aquatic environment is likely to seriously impair the effectiveness of sanitation systems.