Cats can be quite fussy about the location of their water bowl. It has to be in a location that they like or they will not drink and could become dehydrated.
In general, they do not like high-traffic areas or areas where there can be sudden and startling noises. Therefore, place the water bowl in a quiet area of the house away from where there is a lot of movement and from where children are playing. Many cats also do not like their water bowl to be near their food bowl, especially if food can get into the water bowl and make it dirty. Cats only like clean and fresh water!
Cats may also prefer not to have their bowl by their litter tray and if you have more than one cat, you will definitely need more than one water bowl. The bowl will need to be placed on a mat to stop it sliding if it does not have its own non-slip base. A bowl that skids around a hard floor will certainly put your cat off drinking with the noise and the movement.