"NPA" an acronym for the Natural Pozzolan AssociationLogo Design Contest Logo Design Contest Contests / "NPA" an acronym for the Natural Pozzolan Association "NPA" an acronym for the Natural Pozzolan Association has selected their winning logo design. For $475 they received 237 designs from 22 different designers from around the world. Find out how LogoTournament works How LogoTournament works Contest Annotation Delete We are sorry, but the time to edit this annotation has expired. Save Cancel Entries by Lumon Return to Contest Return to Contest Comment Activity Order by Ranking Entry Number Comment Activity To leave a comment please click on the logo. Withdrawn New Comment Activity No activity yet.