TDS of drinking water?
Water containing TDS concentrations below 1000 mg/litre is usually acceptable to
consumers, although acceptability may vary according to circumstances. However, the
presence of high levels of TDS in water may be objectionable to consumers owing to the
resulting taste and to excessive scaling in water pipes, heaters, boilers, and household
appliances. Water with extremely low concentrations of TDS may also be unacceptable to
consumers because of its flat, insipid taste; it is also often corrosive to water-supply systems.
The palatability of drinking water has been rated by panels of tasters in relation to its TDS level as follows:
- Excellent, less than 300 mg/litre;
- Good, between 300 and 600 mg/litre;
- Fair, between 600 and 900 mg/litre;
- Poor, between 900 and 1200 mg/litre; and
- Unacceptable, greater than 1200 mg/litre