The tap water is generally safe to drink throughout Australia. Travelling with a reusable water bottle is recommended so you can refill it throughout the day and stay hydrated. There are public taps and bubblers (drinking fountains) available throughout major cities, and most cafés, restaurants or hotels will be happy to fill your bottle at your request. If the tap water is not safe to drink (this is typically only the case in rural areas), there will be a sign above the tap advising so.