Probably the stinkiest farts I've ever smelled are released in central Florida, though I had one occasion in Portland, Oregon, when some old woman in the grocery store ripped one so bad I had to change check-out lines before I puked.
On the forums, we played a game where we decided what farts smell like in major cities [1]. (Do Houston farts smell like oil? Do Los Angeles farts smell like film? Do Atlanta farts smell like peaches? Do New Orleans farts smell like mold and dead bodies?) Here, though, let's talk more about science and experience. Have any of you experienced farts that are local in character?