Limit values

Plant protection products are among the best studied and most strictly regulated chemical substances in the world. Strict limit values must be observed for food and groundwater. The upper limit for residues of plant protection products for groundwater is 0.1 micrograms per liter - i.e. one millionth of a gram per liter. However, not only the active ingredients of pesticides, but also their degradation products are subject to strict limit values.

A distinction is made between «relevant» and «non-relevant» degradation products - so-called metabolites. «Relevant» degradation products can have negative effects on humans and the environment. It is therefore scientifically recognised that stricter limit values apply to them than to «non-relevant» metabolites. Limit values determine how large the amount of active ingredient residues of plant protection products and their degradation products may be, for example in groundwater.