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What Should Be The Ideal TDS Count In Reverse Osmosis Water Purification System To Make Water Drinkable?

Water being essential for all living things is not drinkable sometimes and for that matter we need to clean the water using various techniques. One of such technique is reverse osmosis. What should be the ideal TDS in respect of water to make it drinkable .

asked 2 months ago

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Slammer

TDS in water isn't one the the critical attributes that determine if a water is drinkable. If the TDS is high it can be safe but many people think it is unpleasant (cosmetic attribute).

From the U.S. EPA website:

National Secondary Drinking Water Regulations

National Secondary Drinking Water Regulations (NSDWRs or secondary standards) are non-enforceable guidelines regulating contaminants that may cause cosmetic effects (such as skin or tooth discoloration) or aesthetic effects (such as taste, odor, or color) in drinking water. EPA recommends secondary standards to water systems but does not require systems to comply. However, states may choose to adopt them as enforceable standards.

National Secondary Drinking Water Regulations - The complete regulations regarding these contaminants available from the Code of Federal Regulations Web Site.
For more information, read Secondary Drinking Water Regulations: Guidance for Nuisance Chemicals.

List of National Secondary Drinking Water Regulations

Contaminant

Secondary Standard

Aluminum

0.05 to 0.2 mg/L

Chloride

250 mg/L

Color

15 (color units)

Copper

1.0 mg/L

Corrosivity

noncorrosive

Fluoride

2.0 mg/L

Foaming Agents

0.5 mg/L

Iron

0.3 mg/L

Manganese

0.05 mg/L

Odor

3 threshold odor number

pH

6.5-8.5

Silver

0.10 mg/L

Sulfate

250 mg/L

Total Dissolved Solids

500 mg/L

Zinc

5 mg/L

answered 2 months ago

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