Langelier Index

{
  "id": "MLC-T-ENV-015375",
  "term": "Langelier Index",
  "field": "Environment",
  "definition": "1. An index reflecting the equilibrium pH of a water with respect to calcium and alkalinity. This index is used in stabilizing water to control both corrosion and the deposition of scale. Langelier index = pH - pHs where pH = actual pH of the water, and pHs= pH at which the water having the same alkalinity and calcium content is just saturated with calcium carbonate.\n\n2. An index reflecting the equilibrium pH of a water with respect to calcium and alkalinity; used in stabilizing water to control both corrosion and scale deposition.",
  "abbreviation": "LI",
  "subject": "General environmental",
  "references": [
    "Drinking Water Technical & Legal Terms",
    "Terms of Environment; Federal Remediation Technologies Roundtable Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/langelier-index/"
}