Travel Mistakes You Might Be Making Without Even Realizing It

8. Drinking Tap Water Without Researching Safety

Many travelers assume that tap water is universally safe, especially in developed countries. However, even in modern cities, water quality can vary, and locals may have built up immunity to bacteria that could cause severe stomach issues for visitors. In some places, the water may contain higher mineral content, different purification chemicals, or contaminants that your body isn’t accustomed to. A small mistake—like brushing your teeth with unsafe water—can lead to an uncomfortable (or even dangerous) bout of traveler’s diarrhea. Fix it: Research water safety guidelines before your trip. If tap water isn’t recommended, stick to sealed bottled water or bring a filtered travel bottle like a Lifestraw or Grayl, which removes bacteria and parasites. If you’re staying long-term, consider using water purification tablets or a UV sterilizer like the SteriPEN. Avoid ice cubes and check if restaurants use filtered water before ordering drinks.