My cat kiddie Katt loves to play in her water all the time. We call it her fishy water. She looks so cute that I don't have the heart to stop her.

It is also worth mentioning that certain breeds of cats (namely Maine Coons, I'm not sure if there are any others) have a tendency to be fascinated by water. My Maine Coon loves the sound of running water, sometimes sleeps with her water dish as a pillow, and we especially have problems whenever it rains. While most cats are dying to get inside and away from the water, whenever it starts raining, my Maine Coon always wants to go outside to investigate. She loves going up on the roof for a better view when it is sprinkling (she doesn't enjoy hard rain or strong winds)! Then when she comes inside she's all excited and her coat is dripping wet. I suspect their undercoat has something to do with them not minding rain. The water never seems to reach the skin; it just sits on top of the fur, so she probably never actually feels wet.
If your cat is not a Maine Coon, or if this behavior has developed suddenly, however, it is probably better not to assume it's merely a harmless fascination and perhaps take kitty to the vet, especially if she has an increased thirst and is of older age, as suggested in the article.