TDS Meter Readings: What the Number Can and Cannot Tell You

Sun, 24 May 2026 00:00:00 +0000

A total dissolved solids meter can be a useful little instrument when the question is narrow. It can show that one sample has more dissolved ions than another, or that a reverse osmosis membrane is changing the broad mineral load in water. It cannot tell you whether the water is safe, which substances are present, or whether a filter is certified for a named contaminant. The small screen gives a clue, not a verdict.

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TDS Meter Readings: What the Number Can and Cannot Tell You