The detailed report made by the World Health Organization (WHO) gives a clear overview of the fact that the details on health effects that are associated with the TDS in drinking water are still not available. There are no guidelines that have been made for the ideal TDS amount in drinking water. There are several factors due to which the TDS level rises in the water. In the areas where the amount of TDS is higher than the normal condition, it must get the individual constituents to be identified. BSI or The Bureau of Indian Standards is the national organization that sets the guidelines to define the quality of drinking water. The limit set by BSI for the TDS amount in water is 500 mg/L. It has also mentioned that in this case, if no other alternative source is available then this limit can be relaxed up to 2000 mg/L. Besides, BIS suggests that if the amount of TDS in water exceeds 500 mg/L then this may result in the degraded acceptable taste and also may cause gastrointestinal irritation. Even the water with a TDS level below 50 is not suitable for the drinking process because this water lacks several essential minerals. The water with a TDS level of 50-150 mg/L is still acceptable but the one which is considered the most ideal is 80-150 mg/L. The TDS value of the purified water through a RO is majorly above 80 mg/L and below 150 to 100mg/L. In this case, if you are highly attentive towards cardiovascular fitness then the TDS value in the range of 150-250 mg/L is ideal. Most home purifiers are not able to purify the water with a TDS value above 2000 mg/L so better to avoid it for drinking purposes.