Walked up to my car today (As it was running) and I noticed quite a large leak near the rear of the engine compartment, just in front of the firewall, that was leaking onto the floor. As I looked closer, I noticed this appeared to be two pretty heavy drips. The fluid was colorless and didn't smell, in fact it seemed to be water. My A/C was running at the time so I switched it off and the drips slowed down. It seemed very excessive when the A/C was on. Is this normal or is it something I should be worried about.

Thanks