French National Hydrological Situation Bulletin of the 13th June 2025
Every month, the Hydrological Situation Bulletin (BSH) describes the state of water resources in mainland France during the previous month (precipitation, soil moisture, snow cover, river flow and dam levels, groundwater levels) with maps and an analysis of the situation.
Key figures from the BSH for this month:
- Average monthly rainfall 30% below normal across France;
- 46% of groundwater observation points above monthly normal levels;
- 3 departments in crisis, 11 departments on drought alert or heightened alert.
Across France as a whole, rainfall was 30% below normal. Surface soils dried out significantly north of the Loire, as well as in the Grand Est, Sud-Est and Corsica regions. Soil moisture indicators are generally close to normal across much of southern France and Corsica.
Drainage is active in almost all aquifers, and 75% of levels are falling. The situation for aquifers remains mixed: close to or below normal for reactive aquifers in the north and above normal for inertial aquifers and aquifers in the south and Corsica. Aquifer levels in Roussillon and the Corbières massif remain worrying, ranging from low to very low.
In May 2025, the hydraulicity map reveals marked contrasts in France, with deficits, particularly in the north-east, while surpluses are observed locally in the south. Minimum flows are generally deficient, particularly in the northern and eastern half of the country. The south-west, the Pyrenees and Corsica have more favourable conditions.
Find all the French hydrological situation bulletins
The national hydrological situation bulletin (BSH national) describes the state of water resources on the metropolitan territory of the previous month.
It is the result of collaboration between different data producers and managers:
- Météo-France for meteorological data (rainfall, soil moisture, snow cover);
- the basin DREAL1 and Vigicrues service (ex. SCHAPI2) for data on river flows and the state of filling of dams (in collaboration with other national players, such as EDF3 , VNF4 and EPTB5 such as Seine Grands Lacs and Loire);
- BRGM for groundwater levels. These data are produced ten times during the year, which explains their absence from certain bulletins;
- the French Biodiversity Office (OFB) for observations on low water levels (between June and October).
The bulletin is produced under the aegis of the editorial committee made up of the various contributors to the BSH (data producers and managers), led by the International Office for Water (OiEau), in conjunction with the OFB and the Water and Biodiversity Directorate of the Ministry of Ecological Transition.
1 Regional Directorates for the Environment, Spatial Planning and Housing
2 Flood Forecasting Support Service
3 Électricité de France
4 Voies navigables de France
5 Territorial basin public establishments
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