Parameter Tree:
EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > WATER QUALITY/WATER CHEMISTRY > CONTAMINANTS > INORGANIC MATTER

Definition:
Dissolved or particulate substances that are not hydrocarbons or hydrocarbon derivatives. Variables such as dissolved inorganic matter (DIM) or particulate inorganic matter (PIM) are included as detailed variables under inorganic matter.

Reference:
Webster's College Dictionary. 1991. Random House.