PRESTIGE H2O / WATER, UNDERSTOOD
Measure before you choose.
A useful hardness result identifies the sample location, test date, method and units. Hardness usually refers to dissolved calcium and magnesium; it is not the same measurement as total dissolved solids. Use a result appropriate to your water source when discussing sizing, and request separate testing for concerns that a hardness test does not measure.
Record a useful result
Keep the test date, sample location, method and units. Hardness is commonly expressed as mg/L as calcium carbonate or grains per gallon.
Keep the scope clear
A hardness test answers a hardness question. Other concerns require appropriate testing; a single meter reading does not identify every contaminant.
Use the result in selection
Review measured hardness alongside household water demand and model operating limits. Avoid sizing a system from bedroom count alone.
Questions and answers
Does a TDS meter measure hardness?
No. A TDS estimate concerns dissolved material generally; it does not isolate calcium and magnesium hardness or identify specific contaminants.
What information should accompany a hardness number?
Keep the units, sample location, date and method with the result. Avoid comparing bare numbers from different units or different sampling points.
Does a hardness result prove overall water safety?
No. Hardness is one water characteristic. Questions about specific contaminants or microorganisms require appropriate separate evidence.