Langelier Saturation Index or LSI - The Langelier Saturation Index, often abbreviated to LSI is an important measurement of CaCO₃ potential and is used as a key performance indicator in the management of reverse osmosis systems. A positive Langlier Saturation Index indicates that CaCO₃ can precipitate. A negative LSI indicates that the water is corrosive to steel.

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Reverse Osmosis Chemicals International work closely with a diverse range of global organisations, intelligently combining advanced treatment technologies with practical solutions to resolve complex issues. If you have a project you would like to discuss, or you require technical support and assistance; or if you simply have a question about our reverse osmosis technology solutions please contact one of our specialist advisors using our Technical Support page or call us on +44 (0) 330 223 31 31.