Your RO Purifier Shows 25 TDS — Is That a Good Sign or a Problem?
If your purifier shows this figure, then chances are you’ve wondered yourself — is 25 TDS Safe for Drinking? Ever since ROs made their way into most Indian houses, this question is extremely common and asked about.
Read on as we break down what TDS means and whether drinking water with a TDS level of 25 ppm can harm you.
What is TDS in drinking water?
TDS Total Dissolved Solids refers to the total amount of dissolved mineral ions that can be found in your water, such as calcium, potassium, and even heavy metals such as Lead, etc., in parts per million (ppm) or milligrams per litre (mg/l). The greater the number, the higher the amount of dissolved constituents your water contains. The most important part is to understand not all TDS in your drinking water is BAD!
Calcium, potassium and several other minerals are essentially healthy.
For you to be able to use the TDS reading on your purifier meaningfully and to avoid giving yourself a shock from the TDS reading, know here exactly what your water TDS level should ideally be like:
Is 25 TDS Safe for Drinking Water?
TDS at 25 ppm for water is safe with regard to its purity; it’s entirely safe from contamination or toxic substances. But there’s a catch here; it will not supply your body with any essential minerals because of its very low dissolved solids content.
The Bureau of Indian Standards (BIS) and the WHO (World Health Organization) suggest the optimum of TDS should be between 50 to 150 ppm. The reason TDS at 50 ppm (TDS level for RO output) comes well below the 50-50 mm mark is that it leads to what you’d called ‘ultra low TDS water’.
TDS Level Chart: Which reading does What in your Drinking Water
| TDS Range (ppm) | Quality |
| 50 and under | Ultra Low |
| 50–150 ppm | Ideal |
| 150–250 ppm | Fair |
| 250–300 ppm | Good |
| 300–500 ppm | Better than Fair |
| 500 and above | Not acceptable for long-term normal drinking |
Why is an ultra low tds range not beneficial for the body:
Even though drinking water 25 ppm might seem perfectly pure and fit for consumption as water, 25 ppm would generally not cause anyone to fall ill, but as a main source of drinking water, drinking extremely low TDS water is actually undesirable over an extended period because it may strip off your bodily reserves of Minerals like calcium, potassium & magnesium, etc., thus making you mineral deficient.
And additionally, extremely low TDS of drinking water as a general rule ‘tastes’ like water with hardly any dissolved salts and thus its ‘taste’ would not be very good/sweet.
In addition, if your RO purifier does not have a TDS controller or a mineralizer stage, then it has stripped the RO water of all kinds of dissolved solids, including those which are actually important to the human body! These are the reasons why ROpurified water is often not very tasty at all.
What does it mean when your RO purifier shows TDS 25?
As we discussed, the fact is your water has gone through 99.99% and is probably now 99% free of the usual harmful constituents.
The cause behind your RO purifier water reading less than ideal 50-150 ppm is often its lack of a RO TDS controller and mineral cartridge, or possibly you just have not set your TDS controller properly and it is in a closed state.
What to do if your purifier reading is 25 TDS and below?
The easy answer is to enable the TDS controller or in layman’s terminology “blend” the RO treated water with some raw water (to the desired TDS balance). A TDS controller in DrinkPrime RO water purifier helps in mixing a certain percentage of RO feed water back to the purified water and this process allows it to raise the TDS level of your purifier water from just 25-30 ppm to 80-150 ppm, thus balancing purity and minerals.
An alternative to this is to install a separate mineralizer or an alkaline cartridge in the RO purifier; it adds healthy trace elements in purified water. Make sure your purifier is serviced regularly: TDS problems can also be a by-product of a well worn off R O membranes or a TDS controller not set on required level by a trained service person for the purifier. Also, it becomes very difficult for a body to recover certain of the necessary trace elements if drinking water T D S levels are consistently in single digit numbers / too lower for prolonged periods of time; so ensure your body is getting enough of the requisite vitamins and minerals in the body.
FAQs
Is It Dangerous to drink water with TDS of 25?
25 TDS Is Perfectly safe from contamination but will eventually rob the body of beneficial minerals when consumed over long haul.
What TDS Should my RO Water Have?
Ideally in between 50-150 TDS for an Indian to achieve an optimum blend of pure drinking water, great taste and required nutrients.
What is the best TDS of water in India?
According to ISI standards and the WHO, drinking water should have 50-150 ppm of TDS which is the ideal balance.
Will boiled water reduce TDS?
Boiling won’t reduce the TDS level in water – it can actually slightly increase the TDS as a portion of the water will be evaporating, leaving the dissolved solids behind.
Is water with a TDS Level of 25 safe to drink?
Water with a TDS level of 25 ppm can be suitable for drinking, but TDS alone does not determine water safety. Very low TDS water may have a flatter taste due to its low mineral content. A TDS controller or mineraliser can help maintain a better balance of minerals.
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