What are the minimum requirement of the minerals which must be present in drinking water? Should we take Water(for drinking) having TDS less than 50mg/L?
The peruvian city of Chilca is supplied with desalinated water. The TDS is with 335 ppm well below the Maximum Permissible Limit of 1000 ppm: http://trust-grow.de/wp-content/uploads/2018/12/Fenix_Desalinizacion_271118.pdf and the users believe it has a very good taste: https://www.youtube.com/watch?v=XYbqdo5G77E
I have previously replied to a similar question on this forum. Please see the below given RG link.
https://www.researchgate.net/post/Is_RO_Water_safe_to_drink
The place where I live in, gets ground water (through bore wells) with 1100 TDS & the RO water brings it to 150 TDS. It appears that 300 TDS use is fair enough.There are areas in the state I live in, where citizens consuming borewell water are prone to the problem of Kidney stones. So various doctors say that in order to prevent this, plenty of water needs to be consumed.
But your question is whether it is safe to consume water having less than 50mg/L. I think it is well below prescribed limit, as human physiology do require various salts for its proper functioning.
The parameter for drinking water was already set by WHO . The concentration of minerals not exceed the limits given by WHO . RO water is suitable for drinking purpose if all the minerals are present in water but in a sufficient amount . TDS less then 200mg/L is not suitable for drinking purpose.
Because you can get your minerals from the foods you consume, the only way to get truly sick off of reverse osmosis water is drink this type of water only and not eat for several days. So, for your average person and situation, drinking RO water is completely safe if all the minerals are present in water but in a sufficient amount . TDS should 225-260mg/L is suitable for drinking purpose.
I agree with all the above answers but there are many companies who set the RO system in such a way that Out put water is having less than 50 mg/L of TDS, Now the many authorities are also saying that RO water with TDS less than 200 mg/l is not good for human consumption.
Exactly so and for this reason, TDS meter is installed such that any one can control .
Dear Ghosh, one must control the TDS of Drinking water, But question is why it is harmful and upto what extent. Because many thoughts say that the minerals can be supplied from the foods which we take, and also no minimum limits of the TDS or any parameters have been given by WHO or any other Standards. Is it not the time to look into this matter to regulate the same.
Dear Dr S. K. Srivastava, it is highly harmful for consumption of high TDS content water. You are thinking only about the minerals , but there might be present harmful toxic substances or toxic heavy metals. According to WHO, TDS content should not be more than 500 mg/L , highest desirable limit is 1000 mg/L.
There is one news that- TDS levels below 3 mg/L have been reported and consumption of this water for months at a time is common on submarines. No health problems have been reported by the Navy and they feel low TDS water is safe to drink. ... They do not consider low TDS water to be a problem and have no minimum standard.
However, in my opinion less than 50 ppm TDS is Unacceptable as it lacks essential minerals and in long way it may affect human body if certain minerals are not taken as supplements.
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