leak checks and visual inspections of sewerage systems with an internal diameter of less than 600 mm
North sectorleak checks and visual inspections of sewerage networks in the North sector: CDC Ile de Ré, CDC Aunis Atlantique and CDC Aunis Sud sectors
Center sectorleak checks and visual inspections of sewerage networks in the central sector: Caro, CDC Oléron, CDC Marennes, CDC Coeur de Saintonge and CDC Vals de Saintonge sectors
South sectorleak checks and visual inspections of sewerage networks in the southern sector: CDA Saintes, CDC Gémozac and CDC Haute Saintonge sectors