Do not know SteveA as when we were over last we were not able to pay the water bills at the Belediye as the system was being changed over. Will look in to this when next over.
The thing with Aydem is that they email me the details of the bill when it is due as I registered with them for this service but I doubt if this can be done with the water unless the new system has been upgrade, which I suspect will not be the case but you never know!