ambient air standard
noun
the highest concentration of a specific air pollutant at a particular outdoor location, in a specified unit of time, that is not considered hazardous to humans: The ambient air standard for gas X is 3 parts per million per hour.
Origin of ambient air standard
First recorded in 1970–75
Words nearby ambient air standard
ambidexterity,
ambidextrous,
ambien,
ambience,
ambient,
ambient air standard,
ambient music,
ambient noise,
ambiente,
ambiguity,
ambiguous