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The following table shows purification methods by different filtration options;

Filtration Options Insoluble Impurities Soluble Impurities Biological Impurities
Boiling Does not Remove Does not Remove Removes
Chlorination Does not Remove Does not Remove Removes Partially
Carbon Filtration Does not Remove (Removes foul smell & taste) Does not Remove (Removes foul smell & taste) Does not Remove (Removes foul smell & taste)
Ozonation Does not Remove Does not Remove Removes
Resin Filtration Does not Remove Does not Remove Removes Partially
Filtration (Candle) Removes Does not Remove Does not Remove
UV Systems Does not Remove Does not Remove Removes
Reverse Osmosis Removes Removes Removes