Total Dissolved Solid (TDS) in water are some organic and inorganic materials, which includes minerals and ions that are dissolved in a particular quantity in water. When water passes through stones, pipes or different surfaces, the particles are absorbed into the water.
A high level of TDS in water can lead to a number of health problems. A high TDS level however can affect the taste and odor of water. The presence of potassium, sodium, chlorides increases the TDS level in water.
The Environmental Protection Agency in the US has set the maximum recommended level of 500 mg/L. 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/L
Good: between 300 and 600 mg/L
Fair: between 600 and 900 mg/L
Poor: between 900 and 1200 mg/L
Unacceptable: greater than 1200 mg/L