TD5 wine and coolant loss.

I have started loosing a small amount of water over a few weeks, and today it started a noise that sounds like a power steering pump that is running dry, there is however plenty of oil in, On inspection there looks to be a very small amount of play on the water pump pulley, could the noise be the bearing going made worse when the power steering pump puts it under load as i carnt tell if its coming from the water pump or the power steering pump?
Any help would be much appricated.
Jim