2001 Ford Taurus coolant leak

I recently discovered that there was radiator fluid in the driveway so I proceeded to try and locate the leak. I thought I located it in the heater hose, but when I removed it there were no cracks or damage in it. So I put the hose back on and ran the car for approximitley 45 mins with the heater off, no leaking. The Next day I drove the car around with the heater on, when I returned home the dripping started again, I poped the hood and noticed that on the passengers side of the engine in the front near the radiator, just below the upper radiator hose and heater hose there was a pool of coolant on the frame and components; I just can't seem to determine if its leaking out of the water pump, heater core or if the head gasket going bad. Any help you could provide me would be greatly appricated.