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Analysis of mineral water

Mineral water: what requirements must it fulfil?

Mineral water has a reputation of being clean and enriched with minerals. This cleanliness is a result of it being retrieved from very deep and well protected sources, which are subject to a minimum amount of treatment, and inaccessible to substances which are used near groundwater sources.

Nevertheless, it is important that mineral water is subject to regular checks, as foreign substances can still be present in the water. 


What foreign substances are found in mineral water?


Although mineral water typically lacks the pesticides and chemicals (e.g. cleaners, antibiotics) which can be found in tap water, it’s possible that the following foreign substances are contained in the product:

  • Heavy metals: boron and uranium are examples of heavy metals which can be found in mineral water. These heavy metals occur naturally in soil and rock layers.
  • Pesticide traces: although not very common, mineral water may still contain pesticide traces if the source is in the vicinity of fields.
  • Microplastics: studies have shown that microplastics can migrate from plastic bottles into mineral water. Little is known about how microplastics effect the human body when ingested, nor is there an established testing method. Research is currently being done on both these matters.

Mineral water is also popular due to the minerals it contains, such as calcium and magnesium. Other useful minerals found in mineral water include sodium, potassium, and sulphate.


What requirements must mineral water fulfil & how can bilacon help?


In some cases, mineral water does not live up to its name in terms of mineral content. Some mineral waters in fact, contain very few minerals. In order to be allowed to use the indication “high in minerals” on the label, a mineral water must contain at least 1500 mg/l of dissolved minerals.

Consumers expect high standards when purchasing mineral water. Therefore, it has to be tested to make sure the product’s high standards are met. If excessive amounts of heavy metals and chemicals, or a lack of minerals are found, the product may be subject to recalls, which may be costly to the company, subsequently damaging their brand reputation.  

The regulations which protect the quality of mineral water in Germany are found in the Regulation on Natural Mineral Water, Spring Water, and Table Water (Mineral and Table Water Ordinance) This regulation sets the upper limits for contaminants and foreign substances in mineral water.

At bilacon, we perform water analyses. This includes testing for pesticide or chemical residues, as well as ensuring the product does not contain harmful microorganisms. Furthermore, our laboratories analyse the composition of the water to uphold the guidelines in the regulation, and to ensure that the mineral quantity requirements are met.


Our analyses include testing mineral water for:


  • pH value
  • Density
  • Microbiological examinations
  • Sensory evaluations
  • Mineral contents
  • Label Checks to verify all the information provided is correct


Do you wish to learn more about our services? Contact our expert:


Nicole Schröer
+49 30 206 038 133

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