I'm going to assume that if neither faction has bothered trying to take it or bomb it, it's probably got not more than a few hundred transient occupants. Probably limited electricity, and if there is I would guess its from solar that a technopath got working, and in that case very likely incredibly expensive to trade for. I imagine most gifted bold enough to come to a place like this are either very rough, desperate, or at least have been in the Ash long enough to know how to watch their own backs. A lot of stuff is broken or rusted, and if there is running water, again, I imagine whoever's claimed the turf it can be gotten from is charging a heavy fee. 

My guess is that if you don't want to trade goods or services, you wouldn't want to be there. 

The Ash is a very rough place to live, and "settlement" is a bit of a loose term.