What Does
Parts Per Million Mean?
Parts per million (PPM) is a unit of measurement used when expressing a very dilute concentration level of pollutants in the air, water and other fluids. For example, 1 PPM of ink in water means that in a million mass units of water there would be one mass unit of ink. Thus, PPM refers to one item in a million of anything of the same size.
Safeopedia Explains Parts Per Million
PPM is commonly used in measuring air, water and body fluids pollution. PPM is the mass ratio between a component and a solution. Mathematically, 1 PPM can be expressed as following:
- 1 PPM = 1 mg/kg
- 1 PPM = 1 mg/ltr
- 1 PPM = 0.0001 %