How about, probably never?
Even thou newer construction is “lead free” , that does not account for our water provider, which may or may not be “lead free”.
Asbestos, even thou it was out lawed in “popcorn” ceilings and other construction applications (any out there know the date?), asbestos is a natural substance, how do you “contain” that? And, just how many of those asbestos manufactured oven mits and hot pads from the 40’s/50’s are still out there? (many were given out in those years as promotional items)
Lead paint was phased out (by government mandate), but for a while in some states was still available in quarts only. (4 quarts made a gallon, so after 4 trips to the paint store, I had enough to do my bathroom!!)
I know that the NACHI team may have the dates after which these products were completely pulled off the market, and will hopefully share their knowledge.
That will not, however, save the buyer of my house, as I still have lead based paint in my garage for “touch up” (waste not, want not!!)
To comply with the “truth in posting” I have little faith in the “new” science of scare tactics. I have lived in a house for 40 years with, lead paint and plumbing, asbestos wrapped pipes and heating ducts, and much to the unhappiness of social security, I now collect my pathetic monthly check!!
The smoking will kill me much sooner than any exposure to asbestos and lead paint will!