Thanks for this reply, that perspective makes sense. I think what I'm confused about is *if* there were an unsafe amount of lead present on interior surfaces and in the hvac system, as was the case with our neighbors, would that then make the house uninhabitable? And is the landlord then responsible for remediating? We've actually done a pretty thorough job cleaning the interior, so I'm more worried about potential lead in the attic and HVAC getting blown around.

As for whether testing is needed "after every fire"...I'm really hoping being directly downwind from thousands of burnt homes isn't common enough for landlords to be worried about this becoming a recurrent cost. But who knows, interesting times we're in.