Lead pain is usually found in older urban construction, but didn't stop being used until 1978 so some older homes in Columbia may have it. That said, as long as it isn't chipping, it isn't a danger. I recently was updating home insurance (my home was built in the 60's) and had to repaint a few areas to eliminate the risk of chipping lead paint.

If you buy a house or rent a place built later than 1978 (most of Columbia, and most of Howard County) then there's zero concern.