Why would the antifreeze in the water leak out of the air conditioning drain of a Peugeot 206 SW?

There are multiple reasons why the air conditioning in your Peugeot 206 SW might be leaking. It might be the normal condensation that occurs with all car air conditioning units, it may be a problem with the car's heater core, or your radiator might be loosing water. Your best bet to find out what is causing the problem is to take your car into a qualified repairman.