TDS is an abbreviation for Total Dissolved Solids (in a liquid), including organic and inorganic substances. TDS is generally expressed in parts per million (ppm). The TDS measurement is a better reflection of the total mineral content of the water rather than an exact measure of water hardness.


A TDS meter is an excellent tool to test the quality of your water. If you’re using an RO or DI water purification system, the TDS meter is a must have!

1 ppm = 0.058 grains/US gallon

A reading of 0-50 TDS is optimal for blending your soaps and rinsing without spotting. This is 3 or fewer grains of hardness.

If you would like more information about how to improve your cleaning results, give us a call at 616-531-6420 and our Detergent Specialists will be happy to answer all your questions!