TDS — Total Dissolved Solids — is the single most important measurement for understanding your water quality. It tells you how many dissolved substances are in your water, and determines which purification system is right for you.
What Is TDS?
TDS measures the total concentration of dissolved substances in water — including minerals (calcium, magnesium, sodium), heavy metals (lead, arsenic), nitrates, fluoride, and other compounds. It is measured in mg/L or ppm (parts per million). A TDS meter is inexpensive (₹200–500) and gives you an instant reading.
TDS Level Guide
50–150
ppm: Excellent (RO output)
150–300
ppm: Good Quality
300–500
ppm: Acceptable
500+
ppm: Treatment Required
BIS Standard for India
Bureau of Indian Standards (IS 10500) recommends a maximum TDS of 500 ppm for drinking water, with a desirable limit of 300 ppm. Water above 500 ppm is not suitable for regular consumption without treatment.
Choosing the Right Purifier for Your TDS
TDS 50–300 ppm (Municipal/Low-TDS water)
UV + UF purifier is sufficient. RO is optional but wastes some water. Alkaline filter recommended for pH and minerals.
TDS 300–1000 ppm (Common bore/hard water)
RO purifier required to bring TDS to safe levels. Himajal Galaxy with TDS controller ideal — retains essential minerals at 80–150 ppm output.
TDS 1000+ ppm (High TDS bore water)
High-capacity RO with pre-treatment recommended. Commercial RO for large volumes. Contact Himajal for a custom assessment.
Get a Free Water Quality Test
Himajal offers free on-site water quality assessment including TDS, hardness, and contamination check. Book yours today.
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