Does Reverse Osmosis Remove Lead? Lead Removal Systems

Lead enters through corrosion of plumbing materials – not from the water source. Common entry points: lead service lines (pre-1960 homes), lead solder in copper joints (banned 1986), and lead-containing brass fixtures. Low-pH or chloraminated water is more corrosive and leaches more lead.

Yes – RO achieves 95–99% lead rejection regardless of source. AMPAC USA under-sink RO systems consistently reduce lead from 50–200 ppb to below 1 ppb. Rejection is mechanical through the 0.0001-micron membrane pore – unlike carbon filters, there is no adsorption capacity that degrades over time.

• NSF/ANSI 53 certified carbon block filters – adsorb lead ions at point of use
• KDF-55 media – electrochemical reduction of lead and heavy metals
• Distillation – effective but slow and energy-intensive

AMPAC USA recommends point-of-use RO for highest removal efficiency and broadest contaminant coverage beyond lead alone.

• Action level: 15 ppb – utilities must take corrective action if exceeded in 10%+ of high-risk tap samples
• Trigger level: 10 ppb – proactive planning required under 2021 LCRR
• MCLG: zero – no safe level of lead in drinking water

Point-of-use RO is the only way to guarantee lead-free water at the tap, regardless of service line replacement status.