Test results for mineral water reveal the presence of a carcinogenic compound in two specific branded products.
In a recent analysis, Oeko-Test, a well-known consumer protection organisation, examined 53 still mineral waters from across Germany, including popular brands like Black Forest and Gerolsteiner, as well as own-brand products from supermarkets and discounters. The findings reveal that while the majority of the tested waters received a "very good" grade, some products were found to contain elevated levels of chromium(VI), a substance classified as carcinogenic.
Chromium(VI) can occur naturally in the ground, but it can also be introduced through human influences such as pesticides. Prolonged intake of Chromium(VI) over many years could pose a risk, according to Oeko-Test. However, the levels measured in the test are not acutely toxic, and a risk cannot be ruled out with prolonged intake over many years.
Two branded waters and the own-brand products of Netto and Edeka received an "inadequate" grade and failed the test. Specifically, the "Gut & Günstig Natürliches Mineralwasser Still" at Edeka and the "Naturalis Natürliches Mineralwasser Still" at Netto were found to have elevated chromium levels.
Not every still water labeled as "clean" is free from contaminants, as these substances can sometimes slip through quality control measures. In addition to chromium(VI), "forever chemicals" such as trifluoroacetic acid (TFA) and other per- and polyfluoroalkyl substances (PFAS) were found in almost all tested products, at least in traces.
Interestingly, seven mineral waters had TFA levels that exceeded the maximum permissible amount of PFAS that will apply to drinking water in the EU from 2026. TFA and PFAS are difficult to break down and can accumulate in the environment and in the human body.
On a positive note, one of the two test winners, the "Carolinen Naturelle" from Bielefeld, did not contain any questionable ingredients and is sold in a glass bottle. This mineral water was found to be free from chromium(VI) and other contaminants.
In light of these findings, Oeko-Test recommends paying close attention to mineral water purchases or opting for the cheaper and strictly controlled alternative from the tap. For those who prefer bottled water, it is crucial to make informed choices and consult Oeko-Test's official publication or website for their most recent comprehensive analysis to ensure the safety of the products you consume. The test results are available for a fee.
- Health-and-wellness concerns arise from the discovery of elevated chromium(VI) levels in some still mineral waters, particularly the "Gut & Günstig Natürliches Mineralwasser Still" at Edeka and the "Naturalis Natürliches Mineralwasser Still" at Netto.
- In their analysis, Oeko-Test revealed that while some waters were classified as "very good", the contamination of certain products with "forever chemicals" like trifluoroacetic acid (TFA) and per- and polyfluoroalkyl substances (PFAS) is a concerning finding in almost all tested products.
- Aiming to make informed dietary choices, individuals interested in food-and-drink options might consider the safety of mineral waters. For instance, the "Carolinen Naturelle" from Bielefeld, which passed the test and is free from chromium(VI) and other contaminants, could be an appealing option for health-conscious consumers.
