Yes, bees need water just like us. We have built a pond at some expense; however, the 'girls', as we call them, do not want to drink from this. It is aerated with plants, a solar pump and even with a couple of fish. Although the pond is within 5 meters of the hives, they prefer a stoneware bowl of mine filled with rain water and a bed of moss. 

As long as they are happy!