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Q » What is the Langelier Saturation Index (LSI)?

John

03 Nov, 2025

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A » The Langelier Saturation Index (LSI) is a calculated number used to predict the calcium carbonate stability of water, indicating if water will precipitate, dissolve, or be in equilibrium with calcium carbonate. It assists in determining the corrosive or scaling potential of water, crucial for water treatment processes. A positive LSI suggests scaling potential, while a negative value indicates corrosive water, requiring adjustment for optimal water system performance.

Michael

03 Nov, 2025

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A »The Langelier Saturation Index (LSI) is a measure used to predict whether water will form scale or be corrosive. It's calculated based on pH, calcium hardness, total alkalinity, total dissolved solids, and temperature. An LSI value indicates if water is likely to be scaling (positive), corrosive (negative), or in equilibrium (around zero).

David

03 Nov, 2025

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