A water test report lists many parameters. Here is what the common ones mean.
- pH: how acidic or alkaline the water is. IS 10500 gives an acceptable range of 6.5 to 8.5.
- Total dissolved solids (TDS): the amount of dissolved minerals and salts, which affects taste.
- Turbidity: cloudiness caused by suspended particles.
- Total hardness: mainly calcium and magnesium; relevant for scaling and soap use.
- Iron: causes staining and taste problems.
- Chloride: can indicate salinity or contamination and affects taste.
- Total coliforms and E. coli: indicator organisms for microbiological safety. Drinking water should not show them in a 100 mL sample.
The parameters tested depend on the scope you request. Limits are published in IS 10500, so always refer to its latest edition and amendments.
Need help? Use our Book a Test or Contact page, and the laboratory team will confirm scope and sample requirements.