What if a rabid skunk drank from my dogs waterbowl? can the virus still be infective after 2hrs in regular tap water? bowl kept in dark no sunlight

Very unlikely but...: Rabies virus lives in saliva. It does not survive long outside a mammal's body but might survive a couple hours, esp. if away from sunlight. While almost always transmitted via bite it could theoretically enter a dog's body through the mucous membranes of the mouth. However, the odds of this seem small and, if your dog has been vaccinated for rabies it is very unlikely your dog would be infected.