Source: Centers for Disease Control and Prevention — Content from the Centers for Disease Control and Prevention (public domain).
About Know where your water comes from and how it is treated to help you take steps to avoid illness. Learn More Jan. 30, 2025 
Causes of Contamination Tap water can get contaminated by human or animal poop, chemicals, or other sources. July 31, 2024 
Prevention Take steps at home and while traveling to avoid getting sick from drinking water. May 21, 2024 
Well Water Safety Keep your well water safe with proper well construction and continued maintenance. June 4, 2024 Featured 
Waterborne Germs at Home Avoid germs in water pipes and devices by taking steps like flushing faucets and cleaning devices. Mar. 15, 2024 
Communication Resources Toolkit Download, use, and share fact sheets and social media about how to avoid getting sick from water. May 27, 2025 Drinking Water Sources Most U.S. tap water comes from reservoirs, lakes, rivers, or water under the ground. Water Treatment Water utilities remove harmful germs and chemicals from water to make it safe to drink. Water Filters Test your water and choose a filter that removes the germs or chemicals you are concerned about. Safe Water When Traveling If you are not sure if water is safe to drink, boil it or use another method to remove germs. Recycled Water Recycled (reused) tap water must meet safe drinking water standards.