A comprehensive set of inspections and controls accompanies Gerolsteiner on its path from source to bottle. This begins with regular quality checks on the immaculate condition of the source. Every step within the bottling process is monitored by qualified staff and with the help of the latest technology.

Unlike many other water companies, Gerolsteiner has a highly qualified in-house quality assurance team. They conduct over 400 microbiology and chemical analyses daily. Natural mineral water should not contain any substances that may potentially harm people or the environment. Before Gerolsteiner products leave our company, the levels of mineralisation, carbonic acid content, microbiology and many other aspects are rigorously inspected. Our mineral water is tested for over 240 parameters, including but not limited to potential containments like nitrates, heavy metals, polycyclic aromatic hydrocarbons, pesticides and fertilizers, germs or other known harmful substances, such as plasticisers.
Our entire physical production process is also tested for possible risk factors and every step in the process is examined very closely.

Our team of scientists also focus on research and analyse science studies, technology advances and public discourse that are pertinent to our products so we can continually implement improvements and upgrade our faculties.

In addition to our extensive internal laboratory checks, there are regular product inspections by independent third parties, for example, the Fresenius Institute. Other entities inspect glass and PET that come into direct contact with the product to ensure the pristine quality of our mineral water is not compromised.