At work, when ever we pour water down the big sink or the sink where we do dishes, the little trap tray below the dishwashing machine overflows. Does anyone know what the problem may be? It seems to be getting worse too. After every 2 loads of dishes, we have to wait a couple of minutes before the trap tray below the dishwashing machine empties again. It has never done this before. It sounds like there might be a clog somewhere.

either get a drain auger or call a plumber, its only going to get worse