Understanding Total Dissolved Solids (TDS)
Total Dissolved Solids (TDS) is a measurement of the inorganic salts and small amounts of organic matter dissolved in water. These dissolved substances can include minerals such as calcium, magnesium, and potassium, as well as salts, metals, and some trace contaminants. TDS is measured in parts per million (ppm), and a TDS meter detects the presence of these ions. While high TDS levels can indicate potential contamination, a complete absence of TDS is not an ideal scenario for drinking water.
Why is 0 TDS water not ideal for drinking?
Lack of essential minerals
The main concern with 0 TDS water is its lack of vital minerals. Processes like distillation and reverse osmosis remove contaminants but also strip away beneficial minerals such as calcium and magnesium. Regularly drinking this type of water can lead to mineral deficiencies, potentially impacting bone health and other bodily functions.
Potential for electrolyte imbalance
Minerals are essential electrolytes that help maintain proper bodily functions, including nerve signals and heart rhythm. The absence of minerals in 0 TDS water can disrupt the body's natural electrolyte balance. This is especially important as the body loses minerals through sweat and urine, and 0 TDS water doesn't replenish them.
Impact on taste and hydration
Zero TDS water often has a flat or bland taste because it lacks the minerals and gasses that contribute to a pleasant flavor. This can make it less appealing to drink, potentially leading to dehydration. Some research also suggests that demineralized water might increase urination, further depleting minerals.
Can be corrosive
Water with very low mineral content can be corrosive, meaning it might leach minerals and contaminants like lead and copper from plumbing over time. This can not only contaminate the water but also potentially damage pipes.
Comparison of Water Types: 0 TDS vs. Mineral-Rich
| Feature | 0 TDS Water (Distilled/RO without remineralization) | Mineral-Rich Water (Spring/Tap with balanced TDS) |
|---|---|---|
| Mineral Content | Essentially none; minerals like calcium and magnesium are removed. | Contains beneficial minerals naturally absorbed from the earth. |
| Taste | Flat, insipid, or bland due to lack of minerals. | Clean, pleasant taste enhanced by balanced mineral content. |
| Health Impact | Long-term risks include mineral deficiency and electrolyte imbalance. | Supports hydration and provides trace minerals essential for bodily functions. |
| pH Level | Often slightly acidic, below 7.0. | Typically neutral or slightly alkaline, within a healthier range. |
| Preparation | Requires distillation or advanced filtration like RO, often without a remineralization stage. | Readily available from natural sources; may require basic filtration for safety. |
How to make 0 TDS water safer to drink
If you use a purification system that produces 0 TDS water due to high levels of contaminants, remineralization is a key step to make it healthier.
- Add a remineralization filter: Many RO systems can be fitted with a post-filter that adds healthy minerals like calcium and magnesium back into the water.
- Use mineral drops: Adding concentrated mineral or electrolyte drops to your water can restore its mineral content.
- Mix with mineral water: Combining 0 TDS water with natural mineral water can help balance the mineral levels.
- Maintain a balanced diet: Ensure your diet provides adequate minerals and electrolytes from sources like fruits and vegetables.
Conclusion: The balance is key
While the purity of 0 TDS water might seem appealing, it's not ideal for long-term consumption. The lack of essential minerals and the potential for disrupting the body's mineral balance make it suboptimal for daily drinking. The World Health Organization suggests an ideal TDS range of 50 to 300 ppm, emphasizing the benefits of balanced mineral content. For those using purification methods that result in 0 TDS water, adding a remineralization step is a straightforward way to restore its nutritional value and make it safe for regular consumption. For more information on the health risks of demineralized water, you can refer to this World Health Organization report.
