It is important to have a reliable water source near your hive for your bees. Bees use water to feed brood, dilute honey and control the temperature in the hive. The owners of the property where I keep my hive have a shallow bird bath about 30 feet from the hive and took this great shot of a worker filling up for the road.
One important thing to remember is to make sure the water source is either shallow enough so the bees don’t drown or have plenty of floats available for the bees to land on. I’ve heard of some beekeepers saving wine corks and using those for floating bee perches.