In an emergency, you may have no access to clean drinking water from a municipal water supply. Consider the following sources of water that may be available during an emergency and classify each source as either safe or unsafe to drink. Water in an undamaged water heater Toilet bowl water Safe Source of Water Unsafe Source of Water Water in a swimming pool Water in the tank of a toilet Water from melted ice cubes Bottled water with an intact seal Water in a car's radiator