Water funnel question

Is water gathered via the water funnel during rain storms considered “clean”? Or do I have to boil it before drinking?

It has a 10% chance of having a low amount of contaminants (much better odds than drinking from a toilet, but it still benefits from a quick boil).

Forgive my jacking the thread a little, but I have another quick question about water funnels - will you make it possible to craft clean water directly from a nearby funnel as you can with other water sources?