90420000 - Sewage treatment services

CPV code 90420000 in the EU Common Procurement Vocabulary refers to Sewage treatment services. It sits at level 3 of the CPV hierarchy as a class within the 90 division. This code is nested directly under 90400000, narrowing the broader category into the specific area of sewage treatment services. As a leaf code, 90420000 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 sewage treatment services. Contracting authorities across the EU use 90420000 in TED notices and national procurement portals to signal that a tender relates to sewage treatment services.