Dictionary.com
definitions
  • synonyms

ambient air standard

See more synonyms on Thesaurus.com
noun
  1. 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018