Mineral, spring and purified describe different things on a US water label
Separate water-source, treatment and composition terms before treating similar bottle descriptions as the same category.
Mineral water, spring water and purified water can sit beside one another on a shelf, but their names do not all describe the same feature. One points toward natural composition and source conditions, another toward a spring source, and another toward treatment and purity requirements.
Read the complete term under the US rule
21 CFR 165.110(a)(2) defines alternative bottled-water names. For mineral water, the requirements include a protected underground source, at least 250 parts per million total dissolved solids and characteristic natural composition. The provision says minerals may not be added to that water.
Purified water, by contrast, is associated with specified processing such as distillation, deionization or reverse osmosis, together with the incorporated purity definition. The word does not identify a particular spring. Spring water has its own underground-source and collection conditions, including requirements for collection through a bore hole.
Make three different evidence fields
Use these fictional label descriptions to practice. They are not verified products or compliance findings:
| Wording copied | Question it raises | What it does not supply |
|---|---|---|
| Mineral Water | Which source and composition evidence applies? | The amount of every individual mineral in a serving |
| Spring Water | What source and collection description is provided? | An automatic health or taste ranking |
| Purified Water with Minerals Added | What treatment and added-mineral wording is stated? | Evidence that this is the rule's mineral-water category |
Preserve the complete third phrase. Adding minerals to a water does not, by itself, establish the natural-composition category described for mineral water. At the same time, a short phrase on a retailer page is not enough to declare a real bottle mislabelled; obtain its complete identity and supporting information first.
Do not turn total dissolved solids into a nutrient result
The 250 ppm criterion is about total dissolved solids under a particular identity provision. It does not tell you how much calcium, magnesium or another individual substance a glass contains. A threshold is also not a measured value for every bottle using the name.
If an individual mineral amount matters to your comparison, look for actual product-specific information with units, the stated basis and its source. Leave that amount unavailable if the label or matched documentation does not provide it. Do not distribute a total across minerals by guessing.
These are US naming distinctions; other markets can define similar terms differently. The classification does not certify water safety or identify the best choice for a particular person.
For reading a bottle's complete ingredient and nutrition wording, explore Ingredi AI through the official Apple listing or official Google Play listing. Verify captured text against the bottle. No app measurement of dissolved minerals or water-quality certification is established by this guide.