Water from your own well is also an important resource for people who are not connected to the public supply network. Well water can be contaminated with pollutants such as bacteria, heavy metals, or pesticides, which can jeopardise health.

For this reason, it is important to regularly analyse and treat well water before it is used. The qualitative categorisation of well water depends on its use. For the irrigation of plants as irrigation water, a distinction must be made as to whether the plants are intended for consumption. It can also be used as drinking water for animals.

It may only be used for the preparation of food and drink or for personal hygiene if it complies with the Drinking Water Ordinance.