We would need more information about where the water is leaking from to be able to give you useful advice. Is it clear water or does it have a tinge of color that might indicate it is coming from the radiator? Sometimes, if you've been running the air conditioning, the unit may drip liquid created from the condensation process; this is normal for most A/C units. If the water is dripping from your exhaust pipe, it could be normal condensation, or indicate a head-gasket leak. For best results, we recommend you visit your trusted mechanic for a better diagnosis.