FED-STD-209 E Airborne Particulate Cleanliness Classes in Cleanrooms and Cleanzones was canceled on November 29, 2001 by the U.S. General Services Administration (GSA). Recommended by IEST, Preparing Activity organization for FED-STD-209E, International Standard ISO 14644

ISO 14644

ISO 14644 Standards were first formed from the US Federal Standard 209E Airborne Particulate Cleanliness Classes in Cleanrooms and Clean Zones. The need for a single standard for cleanroom classification and testing was long felt...

, Cleanrooms and controlled environments-Part 1: Classification of air cleanliness, and Part 2: Specifications for testing and monitoring to prove continued compliance with ISO 14644-1 will supersede FED-STD-209E.