How to Safely Prepare Formula with Water
Water used for mixing infant formula must be from a safe water source, as defined by your state or local health department.
If You Are Concerned or Uncertain About the Safety of the Tap Water:
You may use bottled water or bring cold tap water to a rolling boil for 1 minute (no longer), then cool the water to room temperature for no more than 30 minutes before it is used.
How to Test the Temperature of a Bottle:
Warmed water should be tested in advance to make sure it is not too hot for an infant. The easiest way to test the temperature is to shake a few drops on the inside of your wrist. Otherwise, a bottle can be prepared by adding powdered formula and room temperature water from the tap just before feeding. Bottles made in this way from powdered formula can be ready for feeding, as no additional refrigeration or warming would be required.
How Long Is the Bottle of Formula Good For After Making It?
- Prepared formula must be discarded within 1 hour after serving an infant.
- Prepared formula that has not been given to an infant may be stored in the refrigerator for 24 hours to prevent bacterial contamination.
- An open container of ready-to-feed formula, concentrated formula, or formula prepared from concentrated formula, should be covered, refrigerated, and discarded after 48 hours if not used.
- Last Updated
- Pediatric Nutrition, 7th Edition (Copyright © 2014 American Academy of Pediatrics)
The information contained on this Web site should not be used as a substitute for the medical care and advice of your pediatrician. There may be variations in treatment that your pediatrician may recommend based on individual facts and circumstances.