(redirected from Nitrifying Submerged Aeration Filter)
NSAFNational Survey of American Families
NSAFNon-Specific Action Figure (Nintendo)
NSAFNational Stolen Art File
NSAFNormalized Spectral Abundance Factor
NSAFNorthern San Andreas Fault
NSAFNova Scotia Agriculture and Fisheries (now Nova Scotia Fisheries and Aquaculture; Canada)
NSAFNational Security Archive Fund Inc. (Washington, DC)
NSAFNon-Standard Allowance File
NSAFNitrifying Submerged Aeration Filter (tertiary water treatment method)