Swiss and French authorities must strengthen their collaboration on water management around Geneva, Ain and Haute-Savoie because droughts and floods "don't care about human borders," according to an official report presented on Tuesday. The Regional Court of Accounts (CRC) for the Auvergne-Rhône-Alpes region and the Court of Accounts of the Republic and Canton of Geneva jointly conducted the audit on cross-border watersheds in the Geneva area, though the study excludes the Rhône River and Lake Geneva, which are managed at the national level.
"We are dealing with a rather magical, unique, and extremely complex territory; it is, in effect, a single metropolitan area—yet there is a border running right through the middle," explained Barbara Falk, President of the CRC Auvergne-Rhône-Alpes, during a press briefing. Falk noted that natural phenomena have no regard for human-drawn borders, while the frequency and intensity of extreme climate events have risen recently, evidenced by droughts in 2023 and 2026 and historic flooding of the Arve River in November 2023.
The report emphasizes that national administrative boundaries do not align with physical realities as the two countries share Lake Geneva, 2,400 kilometres of waterways including the Rhône, and several underground aquifers. Certain anomalies persist, including administrative quirks like the Divonne River becoming the Versoix upon crossing the Swiss border. Other issues have a real impact, such as a one-month discrepancy between the two nations in implementing water-use restrictions.
Auditors argue that the countries must adopt a cross-border perspective fostering a water culture rather than a purely administrative one. They propose establishing a cross-border water observatory, joint prevention initiatives, and enhanced crisis coordination. In light of growing global warming risks, France and Switzerland signed two agreements in September 2025 regarding Lake Geneva water regulation and Rhône transboundary cooperation.
Source: The Local. Read the original report ↗