Respecting water may begin with not polluting it. This is the reason why SCE department turned to ozonated water as a sustainable alternative to traditional cleaning chemicals as of 2022.
Ozone is an inorganic molecule, which kills bacteria, viruses, and parasites and eliminate contaminants. When stabilized, aqueous ozone has the potential to eliminate up to 99.999% of harmful bacteria, surpassing the effectiveness of bleach, and having equivalent or even better effectiveness than many chemical disinfectants on market.
Since 2022, the SSC group, in charge of the cleaning contract, has installed no less than 15 connection points on the CERN site with the support of the team SAM-IN. Buildings 501, 504, 570, 664, 112, 14, 54, 31, 38 and 39 in Meyrin, and 774, 865, 866, 892, 937 in Prévessin, are all equipped with connections to ozonated water machines. 
Indeed this ozonated water method brings an environmentally attractive solution that avoids chemical products and, contrary to traditional cleaning agents, does not leave harmful residues that can contaminate water sources. It therefore helps safeguard aquatic ecosystems and protect our natural water resources. 
This initiative reaffirm SCE's ecologically conscious and sustainable approach.