A water wheel pet fountain includes a lower basin that holds water, a water wheel that lifts water from the lower basin and delivers it to a collector that has an outlet or spout that allows the water to exit the collector and fall back down into the lower basin in an exposed stream accessible to pets for drinking. A motor is removably carried on the basin and a removable cowl covers the water wheel. The fountain can be taken apart for cleaning and the electronics and motor can be separated from the components being cleaned. The parts that contact water have large fillets and can be made with an antimicrobial plastic.