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1. Standards vary from country to country

When it comes to regulating what is considered acceptable drinking water, there are recommended international standards, but different countries have different levels of strictness, and even within countries, regulatory effectiveness concerning testing and treatment can vary greatly. A government’s Ministry or Department of Health, or a special agency like the EPA, sets the national standards. But even with strict measures in place, it is practically impossible to test water for all of the many possibly harmful organisms that might be present, at any given time.

In terms of Total Dissolved Solids (TDS), in the U.S., the Environmental Protection Agency (EPA) advises against consuming water containing more than 500mg/liter, otherwise known as 500 parts per million (ppm) of TDS, although many health specialists believe that ideal drinking water should be under 50 ppm or lower.

The average tap water in America contains approximately 350 ppm of TDS although it is not uncommon for municipal or local water supplies to exceed this. If TDS levels exceed 1000mg/L, however, it is generally considered harmful to human health and should not be consumed.

Sanjeev Kumar-09289943479

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