This is level 4/4, the highest that can be reached. This concerns the groundwater of the Sanne-Varèze-Quatre Vallées sectors, which are located in Isère Rhône and in Bièvre Liers Valloire, i.e. an area stretching from Vienne to La Côte-Saint-André, via Roussillon and Saint-Jean. -de-Bournay.
In fact, water use restriction measures are further strengthened in these sectors: any withdrawal or non-sanitary domestic use is now prohibited. It is no longer possible to water vegetable gardens between 9 a.m. and 9 p.m., to water public or private plants, parks and gardens open to the public or even stadiums and sports fields.
The situation remains very worrying throughout the department. To date, regarding specific underground areas, the Chambaran, Terrasses left banks of Isère, Bourbre and Isle Crémieu aquifers are at enhanced alert level (level 3/4).
For the general alert zones Bourbre, Trièves-Matheysine, Isle Crémieu, Paladru Fure, Sanne-Varèze-Quatre Vallées and Chambaran, they are at enhanced alert level.
Belledonne, Chartreuse-Guiers and Vercors are on alert (level 2/3).
Finally, Oisans-Bonne and the Grenoble metropolitan area are on alert.
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