Danish EPA | The importance of pesticide regulations for the occurrence of pesticides in groundwater
New report shows the results of a study trying to link pesticide finds in groundwater with the age of groundwater.
The age of groundwater can ideally be determined by examining the water content of trace elements that were characteristic of the atmosphere at the time when the water fell as rain on the ground. Depending on how long it has been since the rain fell and the current groundwater formation began, the water content of three different trace elements will vary. By determining the actual content of the substances, the researchers' hypothesis was that one could determine the age of the groundwater for "young" groundwater that was formed less than 50 years ago and "old" groundwater that was formed between 100 and 1000 years. since.
Source: mst.dk (Automatically translated from Danish)