90513800 - Sludge treatment services

CPV code 90513800 in the EU Common Procurement Vocabulary refers to Sludge treatment services. It sits at level 5 of the CPV hierarchy as a subcategory within the 90 division. This code is nested directly under 90513000, narrowing the broader category into the specific area of sludge treatment services. As a leaf code, 90513800 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 sludge treatment services. Contracting authorities across the EU use 90513800 in TED notices and national procurement portals to signal that a tender relates to sludge treatment services.