Associated population values by type of treatment- free cities and districts — year

*Short description The survey of public wastewater treatment provides an overview of the state and development of public wastewater treatment and water protection. The type, quantity and whereabouts of dirt, foreign and precipitation water, discharge of waste water, pollutant concentrations and cargoes, type and scope of wastewater treatment are key features of the survey carried out every three years. The data is collected from institutions and bodies governed by public law, as well as companies and other facilities operating public wastewater treatment facilities. The data are spatially differentiated up to the level of the district-free cities and districts. 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]