The Harmonized Index of Consumer Prices category "Sewerage Collection (04.4.3)" is a classification of services that includes sewerage collection and disposal.
This category is a subcategory of the Housing, Water, Electricity, Gas, and Other Fuels (04) and of Water Supply and Miscellaneous Services Relating to the Dwelling (04.4) categories.
Information provided in the notes pertaining to HICP classifications can be found from the source at: http://ec.europa.eu/eurostat/ramon/nomenclatures/index.cfm?TargetUrl=ACT_OTH_CLS_DLD&StrNom=HICP_2000&StrFormat=HTML&StrLanguageCode=EN&IntKey=22470387.
Copyright, European Union, 1995-2016, http://ec.europa.eu/geninfo/legal_notices_en.htm#copyright.
Eurostat, Harmonized Index of Consumer Prices: Sewerage Collection for Greece© [CP0443GRM086NEST], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/CP0443GRM086NEST, May 24, 2016.