Faint sewer smell in highrise bathroom during high winds in one direction?
Strong wind gusts here in Toronto will cause the water level in my toilet bowl to move up and down, almost as if it were being plunged. I'm on the second floor of a century factory loft. The wild variation in air pressure during strong winds must put pressure on the vent stack. Sometimes the water level in the toilet drops low enough to allow air from the stack to gurgle into the apartment. This is the kind of scenario that could be alowing sewer gases into your apartment, either through the toilet, tub, lavatory sink or kitchen sink.