How much water should a cat drink each day?

There really is no set amount. Cats don't drink water like a dog, but its important they DO drink water. This is why I add some water to canned food. Feeding a cat all dry can lead to UTI problems, liver/kidney problems and overweight cats. 

So to make sure they are getting enough, add a little to the canned food. IF the cat is drinking a lot of water it could be a sign of diabetes.