They’re both low-mineral waters, but they’re made differently and can perform differently depending on your task.

• How they’re made: Distilled water is boiled and condensed to remove many impurities. Deionized (DI) water passes through ion-exchange resins that strip charged minerals.
• What they remove: DI water targets ions (like calcium and magnesium). Distillation can also reduce some non-ionic substances and particulates. Some products combine methods for higher purity.
• Typical uses: Labels may indicate use for appliances, testing, or lab work. Always check the product’s intended use.
• Choosing between them: For many household tasks, either low-mineral option may work, but needs vary. Review product details to match purity and use guidelines.

Deionized water is formulated to remove minerals and is often sold for tasks like appliances or testing, not regular drinking. It can taste flat because those minerals are gone, and some packages note it isn’t intended for consumption.

• Check the label: Look for products specifically labeled as drinking water if hydration is your goal.
• Taste and use: Low-mineral water may be preferred for certain kitchen or appliance tasks; follow the product’s stated use.
• When unsure: If you have questions about your diet or hydration needs, consider checking with a qualified professional.

Product labeling can help you pick the right water for your intended use.

You’ve got a few options, depending on how pure you need the water and your setup.

• Buy ready-made: The simplest route is to purchase deionized or distilled water and check the label for intended uses.
• Use a distiller: Countertop distillers heat, condense, and collect water with fewer minerals; follow the device’s instructions.
• Ion-exchange filters: Some systems use DI cartridges to remove charged minerals; replace media as directed.
• RO + DI: Reverse osmosis followed by DI can increase purity, but maintenance matters.

Purity varies based on source water and equipment. Always follow manufacturer guidelines and choose a method that aligns with your project’s requirements.

It’s easy to search and narrow down options online, then choose a convenient way to get it.

1. Search: Enter terms like “deionized water,” “demineralized water,” or “distilled water” on Walmart.com.
2. Filter: Use category and fulfillment filters to see delivery, shipping, or pickup options available in your area.
3. Check details: Open the item page to review the product description, intended use, and size (e.g., liter or gallon).
4. Set your location: Add your ZIP code or preferred store to see local availability.

Availability can vary by store and region, so reviewing product pages and setting your location can help you find the right fit.

Good storage helps maintain low mineral content and keeps the water clean for its intended uses.

• Keep it sealed: Store in a tightly closed, clean container to reduce contamination.
• Use compatible containers: Keep it in the original packaging or a manufacturer-recommended, non-reactive container.
• Cool, dark place: Avoid direct sunlight and heat, which can affect quality over time.
• Avoid cross-contamination: Pour what you need instead of dipping tools into the container, and don’t mix with other liquids.
• Label and rotate: Mark open dates and use within a reasonable timeframe, following any guidance on the label.

Storage practices can vary by product, so check packaging for any specific instructions.