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Determine if the paint is from 1970 or earlier. Talk to the owner of the home, or the previous owners. Check if the paint is deteriorating.
Most homes built before 1970 often have lead-based paint on the walls, doorways, stairwells, and baseboards. If your home is old and you know it was built in the early or mid 1900s, it may have lead-based paint. Often, historic buildings or homes that are old and have not been renovated contain lead-based paint. If you do not own the home and are a renter, talk to your landlord about the age of the home. Ask them if they know if there is lead-based paint in the home. If you own the home, contact the previous owners to find out if they know if there is lead-based paint in the house. Examine the paint in the home to determine if it is peeling, flaking off, or deteriorating in any way. If it is lead-based, this may be cause for alarm. Lead-based paint that is deteriorating can pose a health hazard, as it will release lead dust as it breaks down.  Pay extra attention to paint that is on doorways or stairwells. These areas usually get more wear and tear, causing the paint to crack, flake, and peel. If you notice the paint is deteriorating and suspect it may be lead-based, test the paint so you can address the issue immediately.