Parts Per Million. PPM is a way of describing how much “stuff” is in a liquid. For example, if you have tap water with a ppm of 200, that means 200 parts per million parts of that tap water is minerals and other stuff.

Similar Terms

  1. Parts per billion (PPB)
  2. Micrograms per gram (µg/g)
  3. Milligrams per kilogram (mg/kg)
  4. Parts per trillion (PPT)
  5. Parts per quadrillion (PPQ)