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Wastewater - connection rates to treatment

<p style='margin:0cm;text-align:justify;font-size:15px;font-family:"Times New Roman",serif;'><span style='font-family:"Arial",sans-serif;'>This dataset provides information on the level of public equipment installed by countries to managed and abate water pollution. It shows the percentage of national population connected to &quot;public&quot; sewerage networks and related treatment facilities, and the percentage of national population connected to &quot;public&quot; wastewater treatment plants, and the degree of treatment. Connected here means actually connected to a wastewater plants through a public sewage network. When analysing these data, it should be kept in mind that the optimal connection rate is not necessarily 100%. It may vary among countries and depends on geographical features and on the spatial distribution of habitats. The interpretation of those data should take into account some variations in countries&apos; definitions, as reflected in metadata.</span></p> <p style='margin:0cm;text-align:justify;font-size:15px;font-family:"Times New Roman",serif;'><span style='font-family:"Arial",sans-serif;'>&nbsp;</span></p> <p style='margin:0cm;text-align:justify;font-size:15px;font-family:"Times New Roman",serif;'><strong><span style='font-family:"Arial",sans-serif;'>Data source(s)</span></strong><span style='font-family:"Arial",sans-serif;'>: Joint OECD/Eurostat questionnaire on Inland Waters. Data for non-OECD countries is sourced from UNSD (</span><a href="https://unstats.un.org/unsd/envstats/country_files"><span style='font-family:"Arial",sans-serif;'>https://unstats.un.org/unsd/envstats/country_files</span></a><span style='font-family:"Arial",sans-serif;'>)</span></p> <p style='margin:0cm;text-align:justify;font-size:15px;font-family:"Times New Roman",serif;'><span style='font-family:"Arial",sans-serif;'>&nbsp;</span></p> <p style='margin:0cm;text-align:justify;font-size:15px;font-family:"Times New Roman",serif;'><strong><span style='font-family:"Arial",sans-serif;'>Contact</span></strong><span style='font-family:"Arial",sans-serif;'>:&nbsp;</span><a href="mailto:ENV.Stat@oecd.org"><span style='font-family:"Arial",sans-serif;'>ENV.Stat@oecd.org</span></a></p> <p style='margin:0cm;text-align:justify;font-size:15px;font-family:"Times New Roman",serif;'><span style='font-family:"Arial",sans-serif;'>&nbsp;</span></p> <p style='margin:0cm;text-align:justify;font-size:15px;font-family:"Times New Roman",serif;'><strong><span style='font-family:"Arial",sans-serif;'>Dataset release date</span></strong><span style='font-family:"Arial",sans-serif;'>: August 7, 2026</span></p> <p style='margin:0cm;text-align:justify;font-size:15px;font-family:"Times New Roman",serif;'><span style='font-family:"Arial",sans-serif;'>&nbsp;</span></p> <p><span style='font-size:15px;font-family:"Times New Roman",serif;'><a href="https://webfs-env.oecd.org/files/Wastewater%20treatment.%20Countries%20Metadata.pdf"><span style='font-family:"Arial",sans-serif;'>Country metadata - M&eacute;tadonn&eacute;es pays</span></a></span></p>