Yes, many RO systems can reduce lead. Choose a model with a specific lead-reduction claim and verify the tap water when old plumbing or service lines are the suspected source.
CDC lists lead among chemicals RO can remove
CDC states that reverse osmosis can remove some chemicals including lead, copper, chromium, chloride and sodium.
NSF/ANSI 58 lead claims
Lead reduction is an optional claim under NSF/ANSI 58. A model listed for lead reduction provides stronger evidence than a generic statement that “RO removes metals.”
Why the building matters
Lead can enter water after municipal treatment from service lines or premise plumbing. That makes tap-level testing particularly important in older homes and apartment buildings.
RO is not the only option
Some NSF/ANSI 53 carbon-based filters also carry lead-reduction claims. If lead is the only issue, a certified non-RO filter may avoid wastewater and electricity.