Lisbon is one of Europe's safest cities. Violent crime is extremely rare. The main concern is pickpocketing on the famous Tram 28 route through Alfama — the tram is extremely crowded and professionally targeted by thieves. Walking Tram 28's route on foot is safer and more enjoyable. The Alfama area at night is generally safe but keep awareness in very narrow streets.
Belém, Chiado, Príncipe Real, and LX Factory are all relaxed and safe. Intendente and Mouraria have gentrified significantly and are now safe and vibrant. Tap water is safe to drink throughout Lisbon. The emergency number is 112.