Residents with connection to the public sewerage system,including with connection to a central wastewater treatment plant — circular cities and districts — Year

*Short description The survey on water self-supply and disposal of private households provides information on the number of inhabitants using private drinking water supply or sanitation. The statistics are collected every three years. The provision of data shall be carried out by the cities and municipalities or third parties responsible for public water supply and sanitation, insofar as these tasks have been delegated to them or they have been entrusted with the performance of the tasks. The data are spatially differentiated up to the level of the district-free cities and districts. The survey on household water self-supply and disposal is carried out every three years and provides basic information on the state and development of public drinking water supply and sanitation for water management analyses and planning. The survey on unaffiliated residents is directed at the municipalities or third parties responsible for public water supply and sanitation, in so far as they have been entrusted with these tasks or have been entrusted with the performance of the tasks. It takes into account the increasing interest in the supply of water in terms of quantity and quality, as well as the more frequent private sewage treatment, especially in rural areas, as well as the related environmental problems. The quality report provides information on methods and definitions as well as the quality of the results of a statistics. It is available for free download on the website of the Federal Statistical Office. Here you will find the quality report (usually in PDF format) for this statistics: http://www.destatis.de/DE/Methoden/Qualitaet/Qualitaetsberichte/U mwelt/einfuehrung.html [Link to the list of quality reports in PDF format (file size approx. 0.5 MB)] ___ *Literatur — Statistical Reports North Rhine-Westphalia Here you will find the statistical publications (usually in PDF format) for North Rhine-Westphalia: https://webshop.it.nrw.de/ssearch.php?kategorie=21005 [Link to Webshop of IT.NRW, Statistics division]