Similar term(s): environmental medium.
Soil, water, air, biota (plants and animals), or any other parts of the environment that can contain contaminants.
Source:
ATSDR
Glossary of Terms
One of the major categories of material found in the physical environment that surrounds or contacts organisms, e.g., surface water, ground water, soil, or air, and through which chemicals or pollutants can move and reach the organisms.
Source:
US EPA
Health Effects
Glossary
Español: Medio(s) (en el medioambiente)
Français: Milieu environnemental