Büchel is a small community in the district of Sömmerda in Thuringia (Germany). As part of the implementation of the European Urban Wastewater Directive, the 84 properties in the village were to be connected to the public sewage system. Until 2020, the wastewater of the approx. 300 inhabitants was channelled into three-chamber sewage treatment plants, each of which was located on the properties.