How much TDS in Drinking Water ?

How much TDS in Drinking Water ?
पेयजल में TDS की मात्रा कितनी होनी चाहिए ?
TDS means TOTAL DISSOLVED SOLIDS in drinking water or any source of water. Solids means any types of minerals, salts, metals and other chemical dissolved in water. This TDS measures in “Milligrams per unit volume” or says “Parts per million i.e. ppm”
No recent data on health effects associated with the ingestion of TDS in drinking-water appear to exist; however, associations between various health effects and hardness, rather than TDS content, have been investigated in many studies

Normally
Pond water TDS : 1000 to above (It may depends upon seasons & geographical area, never idle for domestic use.)

Well water TDS : 500 to 800 (below 500 is idle for domestic use. It may depends upon seasons & geographical area. Some places use in domestic purpose.)

Hand Pump water TDS : 400 to 800 (below 500 is idle for domestic use. It may depends upon dip of bore & geographical area. Always use in domestic purpose.)

Tap water TDS : 200 to 400 (It is idle for domestic use. It may vary upon supply system contamination. Always use in domestic purpose. It normally supplied by City Municipal/Overhead Tank through underground pipe line.)

Domestic water Purifier TDS : 20 to 200 (idle for domestic use) TDS may vary upon different types of purifier and its TDS setting. Alkaline Water is the best drinking water in the world.

Some facts from WHO about TDS :- Identity Total dissolved solids (TDS) is the term used to describe the inorganic salts and small amounts of organic matter present in solution in water. The principal constituents are usually calcium, magnesium, sodium, and potassium cations and carbonate, hydrogencarbonate, chloride, sulfate, and nitrate anions. Organoleptic properties The presence of dissolved solids in water may affect its taste (1). The palatability of drinkingwater 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 (1). Water with extremely low concentrations of TDS may also be unacceptable because of its flat, insipid taste. You can click details of WHO report on the link http://www.who.int/water_sanitation_health/dwq/chemicals/tds.pdf
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