65121000 - Water demineralisation services

CPV code 65121000 in the EU Common Procurement Vocabulary refers to Water demineralisation services. It sits at level 4 of the CPV hierarchy as a category within the 65 division. This code is nested directly under 65120000, narrowing the broader category into the specific area of water demineralisation services. As a leaf code, 65121000 has no further subdivisions and represents the most precise classification available in this branch — buyers should reference it directly in tender notices when the procurement primarily concerns water demineralisation services. Contracting authorities across the EU use 65121000 in TED notices and national procurement portals to signal that a tender relates to water demineralisation services.