Yes. A reverse osmosis membrane rejects lead along with other dissolved metals, and a certified point-of-use RO system is one of the standard answers for lead at the kitchen tap. The important caveat is location: lead is almost always picked up in the plumbing between the main and your faucet, so a system only protects the fixture it is plumbed to.
Why the membrane works on lead
Lead in drinking water is dissolved or present as fine particulate shed from solder, brass fittings, fixtures or service lines. A thin film composite membrane rejects dissolved ions of that size class as a matter of physics, and the sediment and carbon stages ahead of it catch particulate and scale flakes that carry lead with them. That combination is why RO appears on almost every list of treatments for lead. Certification is what turns physics into a promise you can hold someone to: look for a system tested to the relevant drinking water treatment standard for lead reduction, and check that the certification covers the complete system rather than one cartridge inside it.
Lead is a plumbing problem, not a source problem
Utilities generally deliver water with no lead in it; the lead joins on the way to your glass. Old service lines, lead solder in joints, and brass fixtures all contribute, and the amount that leaches depends on how corrosive the water is and how long it has been standing. That has two practical consequences. First, a whole-house filter at the point of entry does nothing about lead added downstream of it, which is why point of use at the kitchen sink is the sensible place. Second, flushing matters: water that has sat overnight in a suspect pipe has had the longest contact time, so running the tap before drinking is a free partial measure while you sort out treatment.
Confirming you actually have lead
Every community water system publishes an annual Consumer Confidence Report and the EPA maintains a finder for them, so you can see what your utility measures and whether it has flagged service line issues in your area. That report describes water leaving the plant and the system, though, not the water at your tap after it has crossed your own pipes. Only a first-draw sample from your own faucet, sent to a lab, tells you what your household drinks. If you rent, ask the landlord for any service line inventory the utility has provided. Our home water testing guide covers how to take a first-draw sample correctly, since the timing of the draw changes the result completely.
What RO does not cover
An under-sink RO system protects the tap it feeds and nothing else, so bathroom taps used for tooth brushing, the fridge line if it is not connected to the RO, and any other fixture a child drinks from stay untreated. Plan the plumbing accordingly rather than assuming the house is covered. RO also needs its pre-filters kept fresh to protect the membrane, and a membrane that has aged past its useful life quietly stops performing. Keep the replacement schedule, and confirm performance with a lab test of the treated water once after installation and periodically afterward, because that is the only proof that the system in your cabinet is doing the job the certification says it can.
Questions people ask about does reverse osmosis remove lead
Does boiling water remove lead?
No. Boiling concentrates lead as water evaporates. It is a disinfection measure for bacteria, not a treatment for metals.
Will a carbon pitcher filter remove lead?
Only if that specific cartridge is certified for lead reduction. Ordinary taste and odor carbon cartridges are not, so check the certification, not the marketing.
Should I install a whole-house filter for lead?
Generally no. Lead is usually picked up downstream in your own plumbing, so a point-of-use system at the drinking tap is the effective place to treat it.
How do I know my RO is still removing lead?
Keep the pre-filters and membrane on schedule and send a treated-water sample to a lab periodically. Performance falls gradually with no visible sign.