08/06/2026
We have recently found 80% of municipal water in residential and business properties to be way under the recommended LSI.
What is yours? Use our calculator to see if your water is corroding your pipes or clogging your pipes with scale.
Go to https://www.sanswater.co.za/langelier-saturation-index-calculator to use our FREE calculator or book a water test with mike on Whatsapp 084 400 4300
Measuring pH alone is not safe enough to determine whether you are damaging your plumbing & appliances.
A common misconception is that if your pH is neutral (around 7.0 to 7.4), your water is perfectly safe and balanced. This is completely false.
pH only measures the concentration of hydrogen ions—how acidic or basic the water is. It tells you absolutely nothing about the water’s mineral carrying capacity.
Why Monitoring LSI is Crucial
Monitoring LSI is the gold standard for protecting water infrastructure, whether you are managing a municipal plant, an industrial boiler, a commercial pool, or an RO filtration system.
Preventing Damage (Corrosion): If LSI is too low, water will pit metal, rust iron, dissolve copper, and etch concrete. This leads to pinhole leaks, equipment failure, and structural damage.
Preventing Inefficiency (Scaling): If LSI is too high, calcium carbonate precipitates out of the water. Scale acts as an insulator; just a millimeter of scale inside a heat exchanger or boiler can drastically increase energy costs. In filtration, scale permanently blinds RO membranes.
Predictability: LSI takes the guesswork out of water treatment. Instead of reacting to problems, you can adjust your chemistry proactively to keep the water in a harmless state.
https://www.sanswater.co.za/langelier-saturation-index-calculator
SANS Water offer local onsite water testing with high end testing equipment aswell as SANAS accredited laboratory testing for more detailed results. Both tap and groundwater are constantly changing which is why it is vital that you test your water at least once a year, maybe more in certain circumst...
