The Prefecture of Yvelines maintained on September 18, 2026 the Seine zone territory under enhanced water usage alert, level 3. This measure involves significant restrictions for individuals and professionals.
Watering of gardens and green spaces is prohibited between 11 AM and 6 PM for individual vegetable patches, lawns, flowerbeds, and sports fields. Complete refilling of private swimming pools over 1 m³ is strictly forbidden; only technical top-ups or minimal replenishment is tolerated.
Washing vehicles at home is entirely prohibited. Only professional stations equipped with high-pressure or water recycling systems are authorized. Cleaning of exteriors, such as facades, roofs, terraces, and roadways, is banned, except for sanitary imperatives or professional intervention.
The prefecture reminds everyone that they can contribute to this collective effort by adopting simple gestures: limiting watering, avoiding waste, and checking their installations.
For more information, you can consult the press release, the prefectural restriction order, the website of the Prefecture of Yvelines, or the site Vigieeau.gouv.fr.
