Drinking water must always correspond the highest quality criteria. After all, a healthy drinking water is essential for a healthy life.
Safe drinking water must meet the following requirements:
- - No pathogens in the drinking water;
- - Tasty, colorless and without chlorine smell).
- - No pollutants in drinking water.
- - Drinking water should be at least 5 ° and a maximum of 25 ° hardness level. Calcium, magnesium, carbonate, bicarbonate and sulphate ions are minerals, which contain in dissolved form in the water.Their concentrations are summarily stated as hardness of the water. For use in ordinary household a hardness of water should be 8°dH (hardness 2). A hard water has a hardness of 14 to 21.3 ° dH (hardness 3), a very hard water has a hardness of 21.3 ° dH (hardness range 4).
- - The pH of tap water must be between 6.5 and 9.5.
Drinking Water Ordinance requires the control of 33 values. These include lead content, arsenic, calcium, magnesium, carbonate, copper and nitrate levels in the drinking water, the pH, the conductivity of the water, etc. However, a very important value as the redox potential in the official reports for drinking water quality in Germany is ignored.
Meanwhile, already 50 years ago well-known French hydrologist Professor Louis-Claude Vincent has found, that in evaluating the quality of drinking water and just the redox potential has crucial importance to human health.