Water is extremely important for pigeons. They are heavy drinkers, especially in hot weather. Water should be fresh, cool and clean. You can buy fountains for your birds or you can make them. Water should be covered so bird droppings can not get into the water.
Pigeons like to bathe.
They will bathe in any available water - including their drinking water if you let them. Provide a large dishpan full of cool clean water occasionally. During hot weather especially, the birds will relish it. The cock initiates the nest building and drives the hen to it. Hens lay the first of two eggs between 7-10 days after mating.