From WoWWiki

Swamp Gas occurs in Zangarmarsh. It can be harvested for [Mote of Water], by engineers using a Zapthrottle Mote Extractor.

Some approximate locations where Swamp gas has been encountered:

• In front of (south of) the west end of the Twin Spire Ruins.
• Between the Funggor Cavern, the Bloodscale Enclave and the Darkcrest Enclave.
• Between the Ango'rosh Grounds and the Portal Clearing.

Swamp Gas has also been found regularly near Mekgineer Steamrigger in the Steamvault instance.

Changes

Used to turn into varying amounts of [Mote of Life], but was changed in a patch to give the Engineer [Mote of Water] instead.

External links