It is highly recommended that you do not drink tap water in Tanzania. While major cities like Dar es Salaam and Arusha have water treatment facilities, the aging infrastructure often leads to contamination within the pipe systems. To avoid "Traveler's Diarrhea," cholera, or typhoid, visitors should stick strictly to bottled water, which is widely available and inexpensive. Ensure the seal on the bottle is intact when you purchase it. If you are on safari or trekking Mt. Kilimanjaro, your tour operator will typically provide purified or boiled water. For those who want to be more eco-friendly, using a high-quality water filtration bottle (like a LifeStraw or Grayl) is a great alternative that removes bacteria and viruses from tap water. Additionally, be cautious of ice in drinks at local bars and use bottled water for brushing your teeth. Following these precautions is essential for staying healthy and ensuring your Tanzanian adventure isn't interrupted by preventable stomach ailments.