Can't tell from the info you're giving. Look for the leak- it'll be obvious. If it's under the front end of the engine (where the belts are) it's probably the water pump. If it's under the front end of the car, it's most likely the radiator. If it's coming out under the firewall, probably the heater core. Best bet, take it in for a pressure test. Just don't overheat it, or your problems will be much bigger.
