In general, wetland sites should be located outside of flood plains, or protection from flooding should be provided (Tchobanoglous and Burton 1991).

For reasons of possible odour nuisance, Constructed wetlands should be placed in a reasonable distance to residential areas. The distance of 15-20 m to the nearest building is recommended. The constructed wetland should be secured against entry by unauthorised persons under local arrangements. They have to be marked clearly as wastewater treatment systems.