Comparison

Total Dissolved Solids (TDS) Parts Per Million

# Type ……..TDS…….. Remarks
1 Refresh Distilled Water 0 (Less than 1)
2 Other Distilled 1 – 5
3 Deionised or Demineralised Water (often wrongly referred to as distilled) 2 – 8 Without sterilisation cannot be used for drinking
4 Reverse Osmosis 8 – 20
5 Rain Water 15 – 50
6 Spring Water 70 – 200
7 Filtered Water 60 – 400 Filtration improves the taste but does not remove mineral salts in water
8 Tap Water 80 – 600+
9 Bore Water 1000+