Total Dissolved Solids (TDS) is a term used to describe the inorganic salts and small amounts of organic matter present in water. Some of these dissolved solids are contaminants, and LifeStraw does remove some of them, but many are actually good for you, such as calcium, magnesium, sodium, and potassium. Therefore, TDS is a vague indicator of water quality.  TDS tests do not actually test for contaminants such as heavy metals, chemicals, microplastics, bacteria, or parasites. Bottled mineral water can have a high TDS reading because of the good mineral content. Furthermore, for values below 2,000 mg/l, there is no scientific evidence that TDS affect health.   

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