SURVIVAL CODEX LIBRARY Drinking Water Advisories Source: CDC What a boil-water, do-not-drink and do-not-use advisory each mean, and what to do under each. READ WITH CARE: Copied from cdc.gov on 7 October 2026. CDC revises its guidance as it learns more; check the original page for the current version. ABOUT THIS COPY: Made by Survival Codex on 7 October 2026 from the agency's own page. The agency's text that follows is unchanged; only this cover and the closing page are ours. It is a work of the U.S. federal government, in the public domain in the United States (17 U.S.C. §105). FREE AT THE SOURCE: https://www.cdc.gov/water-emergency/about/drinking-water-advisories-an-overview.html NO ENDORSEMENT: Our use of this material does not imply endorsement by CDC or the U.S. Government of Survival Codex, its products or services. https://survivalcodex.com/pages/library/cdc-drinking-water-advisories ================================================================ DRINKING WATER ADVISORIES ================================================================ KEY POINTS ---------- - Officials issue drinking water advisories to keep people from getting sick from harmful germs or chemicals in tap water. - Recommendations in the advisory depend on the type of germ or chemical in the water. - Follow recommendations from officials during an advisory to avoid getting sick. OVERVIEW -------- Water utilities or government agencies issue drinking water advisories if tap water is, or could be, contaminated with harmful: - Germs (such as norovirus or Shigella) - Chemicals (such as arsenic) - Toxins (such as harmful algal bloom toxins) - Radioactive materials (such as uranium) Advisories provide specific advice about how to avoid getting sick from the tap water. Do not use water or ice from your fridge During any type of drinking water advisory, do not drink or use water from appliances connected to your water line. This includes the water and ice dispensers in your refrigerator or freezer. TERMS TO KNOW ------------- There are three types of drinking water advisories: Boil water advisories tell you to boil your tap water before using it. Boiling kills germs in the tap water that could make you sick. Do not drink water advisories tell you to use commercially bottled water for drinking and cooking. Swallowing chemicals or toxins in the tap water could make you sick. Do not use water advisories tell you to use commercially bottled water for all purposes. Swallowing, touching, or having other contact with the tap water could be dangerous. BOIL WATER ADVISORY ------------------- If local officials issue a boil water advisory, use commercially bottled water or boil your tap water. Boil water advisories usually include the advice below. Boiling water If commercially bottled water is not available, boil your tap water. To kill germs, bring water to a full rolling boil for 1 minute. At elevations above 6,500 feet, boil for 3 minutes. To avoid burns, allow boiled water to cool before you use it. Boil your tap water even if you filter it. For example, still boil tap water if it has been through a home water filter or a pitcher that filters water. Before using tap water during a boil water advisory, bring the water to a rolling boil for 1 minute. Drinking and cooking Use commercially bottled water or boiled water for drinking and to prepare and cook food. Breastfeeding is the best option for feeding an infant. If you feed your child formula, provide ready-to-use formula if possible. Handwashing In many cases, you can use tap water and soap to wash your hands during a boil water advisory. Follow the advice from your local officials. Bathing and showering Be careful not to swallow any water when bathing or showering. Use caution when bathing babies and young children. Consider giving them a sponge bath to reduce the chance of them swallowing water. Brushing teeth Brush your teeth using boiled water or commercially bottled water. Do not use tap water that you have not boiled first. Washing dishes If possible, use disposable plates, cups, and utensils during a boil water advisory. Sanitize all baby bottles. Dishwashers are generally safe to use if they have a sanitizing cycle or reach a final rinse temperature of at least 150°F (66°C). Check the manual or contact the manufacturer to find out what temperature your dishwater reaches. To wash dishes by hand: 1. Wash and rinse the dishes as you normally would using hot water. 2. In a separate basin, add 1 teaspoon of unscented household liquid bleach for each gallon of warm water. 3. Soak the rinsed dishes in the water for at least one minute. 4. Let the dishes air dry completely before using them again. Laundry It is safe to wash clothes as usual. Cleaning Clean washable toys and surfaces with: - Commercially bottled water, - Boiled water, or - Water that has been disinfected with bleach Caring for pets Give pets commercially bottled water or boiled water that has cooled. Pets can get sick from some of the same germs as people or spread germs to people. Caring for your garden and houseplants You can use tap water for houseplants and gardens, including watering plants you eat. DO NOT DRINK WATER ADVISORY --------------------------- Officials typically issue do not drink water advisories when tap water is, or could be, contaminated with harmful chemicals or toxins. Boiling water containing harmful chemicals or toxins will not make the water safe to use. Do not drink advisories may include information about preparing food or drinks, making ice, washing dishes, cleaning, brushing teeth, bathing, flushing toilets, and other activities. During a do not drink water advisory, use commercially bottled water for: - Drinking and cooking - Brushing teeth - Washing fruits and vegetables - Preparing food - Mixing baby formula - Making ice - Giving water to pets Follow advice in the water advisory During a drinking water advisory, carefully follow local officials' advice to protect your health and your family's health. DO NOT USE WATER ADVISORY ------------------------- Use commercially bottled water during a do not use water advisory. Do not drink or use tap water for any purpose as long as the advisory is in effect. Officials issue do not use advisories when any contact with tap water could be dangerous. This includes contact with your skin, lungs, or eyes. The tap water is, or could be, contaminated with harmful germs, chemicals, toxins, or radioactive materials. Do not use water advisories are rare. ================================================================ SURVIVAL CODEX LIBRARY End of the agency text. The current version of this guidance is always at https://www.cdc.gov/water-emergency/about/drinking-water-advisories-an-overview.html. Agencies revise their advice; check the original, and in an emergency follow instructions from local officials. 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