Water Quality

Water can contain very many substances and has to be processed or purified according to its proposed use. The results are a variety of degrees of purity which can be characterised according to diverse criteria. [e. g. measurements of → Conductivity (electrical); determination of the amount of specific types of ion.] Process water Water with different qualitative features (its suitability as → Drinking water could be included) for business, industrial and agricultural purposes Brackish water Water with medium salt content, e. g. the mixture of fresh and salt water which is found at the mouths of rivers. The specific conductivity at 25 °C lies between 0.05 S/cm and 1 S/cm. Drinking water Water of a quality which conforms to the TVO (Trinkwasserverordnung = German Drinking Water Ordinance) regarding, for example, the maximum amount of pollutants. Drinking water has to be maintained at a temperature below 25°C. Its specific conductivity at 25 °C lies between 50 μS/cm and 5000...