As a water quality expert with extensive knowledge in environmental science and public health, I am well-versed in the standards and guidelines set by various health organizations, including the World Health Organization (WHO). When it comes to Total Dissolved Solids (TDS) levels in drinking water, it is a critical parameter that affects the taste, odor, and overall quality of water.

The WHO, in its guidelines for drinking-water quality, provides recommendations on the acceptable levels of TDS. According to the WHO, the guideline value for TDS is 1000 mg/L. However, this value is not a health-based guideline but rather a guideline that takes into account the aesthetic qualities of water, such as taste and odor. High levels of TDS can lead to water that tastes salty or bitter, which can be unpleasant for consumers.

It is important to note that TDS is a measure of the total amount of dissolved solids in water, which includes minerals, salts, and other organic matter. While these substances are generally not harmful, the presence of certain contaminants at high concentrations can pose health risks. Therefore, while the WHO sets a guideline value for TDS, it also emphasizes the importance of monitoring for specific contaminants that may be present in water.

The information provided by the Bureau of Indian Standards (BIS) suggests an ideal TDS level below 300 mg/L for drinking water, with a maximum permissible limit of 600 mg/L. This is a more stringent recommendation compared to the WHO's guideline value, indicating a preference for water with lower TDS levels to ensure better taste and quality.

Furthermore, the BIS recommendation for individuals with kidney problems to drink pure water with a TDS level below 100 mg/L is a prudent approach. People with kidney issues may have a reduced ability to filter out excess minerals and salts from their body, so consuming water with lower TDS can help alleviate the burden on the kidneys and support better health outcomes.

In summary, while the WHO sets a guideline value for TDS at 1000 mg/L, it is important to consider the specific context and needs of the population being served. The BIS's more stringent recommendation for lower TDS levels, particularly for individuals with health conditions such as kidney problems, is a thoughtful consideration that prioritizes health and well-being.

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According to the BIS, the ideal TDS for drinking water is below 300mg/L and the max permissible limit is 600mg/L. It is recommended that people with kidney problem should drink pure water having TDS level below 100 mg/L for better recovery.read more >>