The acceptable TDS (Total Dissolved Solids) for drinking water is generally considered to be between 50-150 ppm (Excellent), with up to 500 ppm considered acceptable by standards like the Bureau of Indian Standards (BIS), though taste may be affected; however, levels above 500 ppm can indicate excessive salts, and the WHO suggests under 600 ppm for good taste, with optimal health often found in the 150-300 ppm range for mineral balance

 The acceptable TDS (Total Dissolved Solids) for drinking water is generally considered to be between 50-150 ppm (Excellent), with up to 500 ppm considered acceptable by standards like the Bureau of Indian Standards (BIS), though taste may be affected; however, levels above 500 ppm can indicate excessive salts, and the WHO suggests under 600 ppm for good taste, with optimal health often found in the 150-300 ppm range for mineral balance. 
TDS Level Guide:-
< 50 ppm: Very low; bland taste, may lack minerals.
50-150 ppm: Excellent, ideal balance for health and taste.
150-300 ppm: Good to normal, good mineral content.
300-500 ppm: Drinkable but taste might be heavy; acceptable by BIS.
> 500 ppm: Requires treatment; may be unsafe.
> 1200 ppm: Unacceptable. 
Key Considerations:-
Taste vs. Minerals: -
Very low TDS water (below 100 ppm) can taste flat, while higher levels (300-500 ppm) offer beneficial minerals like calcium and magnesium.
Health: -
Water with TDS above 500 ppm can contain excessive salts or contaminants, potentially causing health issues, while extremely low TDS can mean a lack of essential minerals.
Standards: -
The EPA sets a maximum of 500 mg/L (ppm), and the BIS also uses this limit, though they allow higher in some cases. 
In essence, water between 50-300 ppm is often best for taste, mineral intake, and safety, balancing the ideal and acceptable ranges. 
Water TDS Level: -
Understanding Safe and Unsafe Ranges - Ion Exchange
29 Oct 2024 — What Is the Best TDS Level for Drinking Water? The best TDS level for drinking water varies depending on the balance of essential minerals and contam...
Ion Exchange
What Is TDS In Drinking Water, And Why Does It Matter?
9 Sept 2025 — What Is the Best TDS Level for Drinking Water? The ideal drinking water TDS level falls between 50 and 300 mg/L, offering the best balance of taste .
MJF Lion ER YK Sharma 

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