Boil, Do Not Drink, or Do Not Use? Understanding Water Advisories

Read the exact advisory

Local officials may issue a boil water, do not drink, or do not use advisory. These terms are not interchangeable. The Centers for Disease Control and Prevention (CDC) explains that a boil water notice generally means germs may be present and residents should use bottled water or boil tap water according to local instructions. A do not drink notice may involve chemicals or toxins, for which boiling is not a solution. A do not use notice can indicate that contact with the water may also be unsafe.

During a boil water advisory

Follow the instructions from the local water authority. CDC guidance generally says to bring clear water to a rolling boil for one minute, or three minutes above 6,500 feet, then let it cool and store it in clean, covered containers. Boil water even if it has passed through a household pitcher filter, unless local officials say otherwise. Use bottled or boiled water for drinking, food preparation, and brushing teeth as directed.

Not every use has the same instruction. Guidance for handwashing, bathing, dishes, infants, and appliances can vary with the specific advisory. Check the notice rather than relying on a generic checklist, and pay special attention to directions for preparing infant formula or caring for people with health vulnerabilities.

Boiling does not fix chemical contamination

CDC cautions that boiling water contaminated with fuel, harmful chemicals, or radioactive material does not make it safe. For a do-not-drink or do-not-use notice, use the alternative water source specified by local authorities and wait for an official all-clear. Do not assume a countertop filter removes every contaminant.

Keep a supply of safe drinking water and save the contact information for your water provider. If you are unsure how the notice applies to your household, contact local officials or your health department.

Sources and further reading

• Drinking Water Advisories: An Overview, Centers for Disease Control and Prevention
• How to Make Water Safe in an Emergency, Centers for Disease Control and Prevention

Health disclaimer

This article is for general education only. Its information and suggestions are not medical advice, diagnosis, or treatment and may not be right for everyone. Ask a qualified health professional for advice that fits your health, medications, and needs before changing your diet, exercise, supplement use, or care.