The topic of 'threshold values' is not only significant for general environmental law. Particularly in connection with the environmental medium of soil, which has been somewhat neglected until now and has only recently received uniform protection through threshold values over the past decade, it raises questions. These arise, on one hand, from administrative law contexts, such as the precautionary principle or enforcement. They also emerge from a constitutional perspective, especially regarding fundamental rights and the parliamentary reservation in setting the values. Finally, the initial integration of soil protection into EU law sparks controversies. This work addresses these questions by analyzing the existing regulatory framework, commenting on current developments, and presenting proposed solutions.