I can't confirm personally that the Baton Rouge area has emissions testing, but I have heard many times that it does. Orleans Parish and the surrounding areas like Jefferson, Plaquemines, and St. Charles do not.
When I lived in Denver, it seemed that was all the Powers That Be cared about. No safety inspection, okay with them if your brakes were shot and your taillights out, as long as your (car's) tailpipe was clean.