Yes, it is safe to take a shower in Tanzania, provided you take basic precautions. While the tap water in urban areas like Dar es Salaam or Arusha is treated, it is not considered safe for drinking due to aging infrastructure and bacterial contaminants like E. coli. When showering, you should keep your mouth closed and avoid swallowing any water. For brushing your teeth, most travel experts and lodges recommend using bottled or filtered water rather than tap water. If you have a sensitive stomach, even a small amount of accidental ingestion could lead to "traveler's diarrhea." In luxury lodges and high-end hotels, the water may be further UV-treated or filtered, but the "no-drinking" rule still generally applies to the tap. Using a washcloth for your face rather than standing directly under the stream is a common tip for cautious travelers.