Water fountains can be found at Athens International Airport, at the following areas for visitors and passengers:
Free access area -> Departures opposite check in counters 21 & 155, as well as opposite WHSmith shop.
Arrivals: close to exits 1 & 5.
Areas accessible to passengers only -> Departures Schengen: opposite Swatch shop, at gates B17 & B21.
Departures Non-Schengen: at the corridor behind Candyfair shop & at the corridor opposite gate A15.
Arrivals Non-Schengen: before entering the Passport Control area.
Baggage Reclaim area: opposite baggage belt 1, between belts 5 &6, and opposite belt 12.
Satellite terminal building: at the tunnel, next to moving walkway 5. At departures, just before departure gates C27-32 & C37-40.