It is crucial to test areas where children spend a significant amount of time for lead contamination. These areas include bedrooms, playrooms, kitchens, and play yards. It is especially important to test these areas if there is bare soil or if the paint is peeling or chipping.
Additionally, it is recommended to test areas that you plan to repaint or remodel. Test multiple spots, and if you are testing paint, test each different paint color. For soil testing, test different areas with bare soil.
Here are some good places to test for lead-based paint:
Window frames and sills
Doors, door jambs, and thresholds
Trim and siding
Painted children's furniture
And here are some good places to test for lead-contaminated soil:
Around the foundation of the house
Where children play
Under windows or walls with peeling or chipping paint
Where pets play or rest
Areas near traffic.
Source: California Department of Public Health