When lead paint can justify leaving
Possibly, depending on the condition of the paint and how your landlord responds. California law recognizes that when a rental becomes truly unsafe and the landlord will not fix it, a tenant may have grounds to move out — but this is a serious step with requirements.
If a deteriorating lead hazard is putting your family's health at real risk and the landlord refuses to address it after written notice, that could support a "constructive eviction" argument, where a dangerous condition effectively forces you out of a home you can no longer safely occupy. Intact, well-maintained lead paint is a weaker basis for breaking a lease. A landlord's failure to give required lead disclosures may also affect your options.
Moving out without meeting the legal conditions can leave you owing rent, so documentation and timing matter. Testing confirming a hazard can strongly support your position.
Before you give notice or move out, confirm your situation qualifies. A free, confidential review can look at your facts and help you decide whether breaking the lease is a safe option.
This is general information about California tenant rights, not legal advice. Every situation is different.