Narrative:

The lead flight attendant notified us that oxygen masks in the front section of the aircraft were automatically deploying and that the cabin had a toxic aroma and was beginning to show a fine haze in the air. I noted he was very excited; speaking with a difficult to understand accent; and coughing. I got out of my seat to look through the cockpit door peephole and witnessed the front several rows of passengers reaching for their masks and covering their mouths to breath. The first officer declared an emergency with ATC and we immediately diverted to the nearest suitable airport. Total descent time was approx. 6-7 minutes. After landing it was determined that the fumes had decreased and the air had cleared. We taxied to the gate; deplaned and notified company of our location and situation.

Google
 

Original NASA ASRS Text

Title: An A319 declared an emergency and diverted due to smoke in the cabin.

Narrative: The Lead Flight Attendant notified us that oxygen masks in the front section of the aircraft were automatically deploying and that the cabin had a toxic aroma and was beginning to show a fine haze in the air. I noted he was very excited; speaking with a difficult to understand accent; and coughing. I got out of my seat to look through the cockpit door peephole and witnessed the front several rows of passengers reaching for their masks and covering their mouths to breath. The First Officer declared an emergency with ATC and we immediately diverted to the nearest suitable airport. Total descent time was approx. 6-7 minutes. After landing it was determined that the fumes had decreased and the air had cleared. We taxied to the gate; deplaned and notified company of our location and situation.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.