Restrictions for feasibility of shallow geothermal drillings
 | Geothermal drilling are not permitted |
 | Geothermal drilling requires authorization. The maximum depth is limited in order to avoid any hydraulic connection between different aquifers. Only heat transfer fluids listed in the «Positivliste» (https://lawa.de/Publikationen-363-Waermetraeger,-Erdwaerme-.html) LAWA (Bund/Länder-Arbeitsgemeinschaft Wasser) are permitted |
 | Geothermal drilling requires authorization. Only heat transfer fluids listed in the «Positivliste» (https://lawa.de/Publikationen-363-Waermetraeger,-Erdwaerme-.html) LAWA (Bund/Länder-Arbeitsgemeinschaft Wasser) are permitted |
 | Geothermal drilling requires authorization. The maximum drilling depth is limited to 120 meters |
 | Geothermal drilling requires authorization |