This reverse osmosis system operates efficiently without the need for electricity, making it suitable for use in kitchens with or without power sources. NSF/ANSI 58 CERTIFIED – Tested and certified by NSF International for reduction of TDS (97.9%), lead (98.9%), fluoride (97.4%), asbestos (>99.7%), barium (98.4%), cadmium (98.8%), chromium (99.2%), copper (97.8%), selenium (99.0%), and more.