Tap water is very good for humidifying the air, but it has no real antibacterial properties. The best way to disinfect water is to boil it, but even boiling water can be dangerous if you don’t do it properly. To disinfect tap water, you can use a special sink filter, which can help keep the tap water clean and safe. You can also use a chlorine dioxide filter, which is an antibacterial product that kills germs much faster than boiling water. But this is just one method of disinfecting tap water.