“Water is the most critical resource issue of our lifetime and our children’s lifetime. The health of our waters is the principal measure of how we live on the land.” – Luna Leopold
What is TDS
TDS stands for Total Dissolved Solids and refers to the total concentration of dissolved substances in drinking water. TDS comprises inorganic salts and a small amount of organic matter as well. Inorganic salts are made up of the positively charged cations (calcium, magnesium, potassium and sodium) and negatively charged anions (carbonates, nitrates, bicarbonates, chlorides and sulfates). The TDS level is how much of the total dissolved solids are present in the water.
Importance of TDS in Drinking Water
TDS in drinking water originates from places like natural sources, sewage, urban run-offs, industrial wastewater, chemicals in the water treatment process, chemical fertilizers used in the garden and plumbing. Water is a universal solvent and easily picks up impurities and can absorb and dissolve these particles quickly. Although elevated levels of TDS in drinking water is not a health hazard, it does lend the water a bitter, salty, or brackish taste. Calcium and magnesium, two minerals commonly found in TDS, can also cause water hardness, scale formation, and staining.
Different TDS levels
The TDS level helps indicate whether the drinking water is fit for consumption, requires filtration or is highly contaminated. Parts per million (PPM) is the measurement used for measuring TDS level in the water.
TDS Level Chart for Drinking Water
TDS in Water (measured in PPM) |
Suitability for Drinking Water |
Between 50-150 |
Excellent for drinking |
150-250 |
Good |
250-300 |
Fair |
300-500 |
Poor, not good for drinking |
Above 1200 |
Unacceptable |
Why Should You Measure TDs Levels
Naturally, mineral water has no smell or taste. A change in the TDS level changes the texture and taste, making the water unfit for consumption. Some of the reasons why you should measure the TDS level of your drinking water are:
Frequently Asked Questions
What is the best TDS level for drinking water? |
Generally, the TDS level between 50-150 is considered as the most suitable and acceptable. |
Is Low TDS level bad or harmful for health? |
If the TDS level is about 1000 PPM, it is unsafe and unfit for human consumption. |
What TDS level Bisleri maintains in water? |
Bisleri water maintains a TDS level of 120 PPM, making it safe to drink. |