Check what the dungeons drop in that zone to get an idea what the generic trait is (so tidal surge/droplet in stormsong), then use azerite.info to search those traits, you'll see stuff named "stormchaser" or something name relevant to that zone, with a faction icon next to it. That's the stuff from that zone. After a while you just know what comes from where, but doing that, you can see the class specific traits on the quest pieces from there as well.