NSF International is a not-for-profit, non-governmental organization that provides standards development, product certification, auditing, education and risk management for public health and safety. The NSF is a third-party certification body, which certifies that drinking water products are safe. All water filtration systems should be NSF certified.

Quench water coolers and ice machines use the Everpure NSF Certified system QL2-OCS2 with replacement cartridge OCS2 or the Omnipure NSF Certified system K2333JJ.