Use a saucepan to boil the water. The water should just simmer gently for 5 minutes. 100 degrees C for 5 minutes will kill the Protozoa and its spores. If the water is cooled and kept in the fridge it is quite pleasant to drink. Outbreaks of Cryptosporidium are fairly rare and localized and you will be warned about them by radio announcements and in the newspapers.
Tap water is almost always safe to drink.