Quick answer: Yes, distilled water is safe for babies and is often recommended for mixing infant formula because it’s free of contaminants and has very low mineral and fluoride content. However, exclusively breastfed or formula-fed babies get their minerals from milk or formula, so plain distilled water should not be given as a drink to babies under 6 months. Always follow your pediatrician’s guidance and formula instructions.
If you’re mixing formula or wondering what water is safest for your baby, distilled water comes up a lot — and for good reason. But there are important details about when and how to use it. Here’s what parents need to know, clearly and safely.
Is distilled water safe for babies?
Yes. Distilled water is made by boiling water into steam and condensing it back, which removes bacteria, minerals, heavy metals, and other contaminants. That purity is exactly why it’s considered a safe, reliable choice for mixing infant formula. Because its contents are consistent, you always know what your baby is getting — no surprises from local tap-water quality.
Why it’s often recommended for formula
Two reasons distilled water is a popular pick for formula:
- Very low fluoride: Distillation removes nearly all fluoride. Infants who get a lot of fluoride from formula mixed with fluoridated tap water can develop faint white marks on their baby teeth (mild dental fluorosis). Using low-fluoride water like distilled reduces that risk.
- No contaminants: It removes lead, bacteria, and other impurities that could occasionally be present in tap or well water, giving parents peace of mind.
The CDC notes that using low-fluoride water such as distilled or purified for formula can lower a baby’s chance of mild fluorosis, while stressing that fluoridated water is still safe.
The one important caveat
Distilled water is for mixing formula, not for giving to a young baby as a drink. Babies under 6 months should not be given plain water (distilled or otherwise) except in the small amounts used to prepare formula, unless a doctor advises it. Their kidneys are still developing, and too much plain water can dilute the sodium in their blood — a rare but serious condition. Babies get all the hydration and minerals they need from breast milk or properly prepared formula.
Do you still need to boil it?
This is a common question. Guidance varies, so check your formula label and your pediatrician’s advice. Many health authorities recommend that for babies under a few months old (or premature or immune-compromised), even bottled or distilled water used for formula should be boiled and cooled first as an extra precaution, because formula powder itself isn’t sterile. Store-bought distilled water is purified but not necessarily sterile in an opened container. When in doubt, boil and cool.
Distilled vs other water for formula
| Water type | Good for formula? | Notes |
|---|---|---|
| Distilled | Yes | Very low fluoride and minerals; consistent and safe |
| Purified / RO | Yes | Similar low-mineral profile; good alternative |
| Tap (fluoridated) | Usually fine | Safe, but slightly higher fluoride; boil for young infants |
| Spring / mineral | Check first | Mineral levels can be too high for infants |
The bottom line
Distilled water is a safe and commonly recommended choice for mixing infant formula, thanks to its purity and very low fluoride. Just remember it’s for preparing formula, not for giving as a drink to babies under 6 months, and boil-and-cool it for very young infants unless your formula and pediatrician say otherwise. When in any doubt about your baby’s water or feeding, ask your pediatrician.
Related reading: our best water for baby formula guide, is distilled water safe long-term, and do water filters remove fluoride.
Frequently asked questions
Is distilled water safe for babies?
Yes. Distilled water is safe for babies and is often recommended for mixing infant formula because it’s free of contaminants and very low in minerals and fluoride. However, plain distilled water should not be given as a drink to babies under 6 months — only used to prepare formula — unless a doctor advises otherwise.
Can I use distilled water for baby formula?
Yes, distilled water is a good choice for formula. Its purity and low fluoride content make it reliable and consistent. For very young or premature infants, many authorities recommend boiling and cooling the water first, since formula powder isn’t sterile. Check your formula label.
Why is distilled water recommended for formula?
Because it removes nearly all fluoride and contaminants. Low-fluoride water reduces the small risk of mild dental fluorosis (faint white marks on baby teeth) from too much fluoride, and the absence of contaminants gives parents peace of mind.
Do I need to boil distilled water for formula?
Often yes, for young infants. Guidance varies, but many health bodies recommend boiling and cooling even distilled or bottled water for babies under a few months, or those premature or immune-compromised, because formula powder isn’t sterile. Follow your formula label and pediatrician.
Can babies drink distilled water on its own?
Not babies under 6 months. They should only get water in the amounts used to prepare formula. Too much plain water can dangerously dilute the sodium in a young baby’s blood. Older babies can have small amounts of water once solids begin, per your pediatrician’s guidance.
Is distilled or purified water better for babies?
Both work well for formula; they have similar low-mineral, low-fluoride profiles. Distilled is slightly more thoroughly purified, but reverse-osmosis or purified water is a fine alternative. Avoid high-mineral spring water for infants unless you’ve checked the mineral levels.
Reviewed by the Complete Water Guide team. This article is for general information and is not a substitute for professional medical advice. Always consult your pediatrician about your baby’s feeding and water. We may earn a commission from some links on this page.
