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, 1995-2014, http://epp.eurostat.ec.europa.eu/portal/page/portal/about_eurostat/policies/copyright_licence_policy.
Statistical Office of the European Communities, Harmonized Index of Consumer Prices: Sewerage Collection for Italy© [CP0443ITM086NEST], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/CP0443ITM086NEST/, November 28, 2015.