Groundwater level remains “satisfactory” in January. This is the observation drawn up by the national geological service.

The levels are particularly positive in the Jurassic limestone aquifers of Boulonnais and those of the Artois-Picardie coastline. The state of the Aquifers generally remains very heterogeneous, varying between very low and very high levels, specifies the geological service, which plans to closely monitor the south-east at the end of winter.