What is Brita Filtered Water?
Brita filtering systems typically employ a combination of activated carbon and ion-exchange resin to purify tap water. As water passes through the filter, the activated carbon adsorbs substances that can affect taste and odor, such as chlorine. The ion-exchange resin, meanwhile, reduces certain heavy metals like lead and copper. While effective at improving the aesthetic quality of drinking water, this process is not designed to remove all dissolved solids and beneficial minerals like calcium and magnesium. For this reason, Brita filtered water is not considered fully demineralized.
What a Brita filter removes and what it leaves behind
- Removes: Chlorine, some heavy metals (like lead, mercury, and copper in certain models), and sediment.
- Leaves Behind: Beneficial minerals (calcium, magnesium), dissolved salts, and may not remove bacteria, viruses, or certain pesticides. Filters can also become breeding grounds for bacteria if not replaced regularly.
What is Distilled Water?
Distillation is a centuries-old purification method that mimics the natural water cycle. The process involves heating water to its boiling point, which turns it into steam. The steam is then captured and condensed back into a liquid form in a separate, clean container, leaving behind virtually all impurities, minerals, salts, and other contaminants with higher boiling points. The result is exceptionally pure H₂O. This purity makes distilled water essential for specific applications where mineral buildup or impurities would be harmful.
The distillation process step-by-step
- Boiling: Water is heated in a boiling chamber, creating steam.
- Evaporation: The steam rises, leaving behind inorganic compounds, minerals, and other substances.
- Condensation: The steam is cooled in a separate chamber or coil, turning back into pure water droplets.
- Collection: The condensed, distilled water is collected in a clean vessel.
Brita vs. Distilled: A Comparison Table
| Feature | Brita Filtered Water | Distilled Water |
|---|---|---|
| Purification Method | Filtration using activated carbon and ion-exchange resin. | Distillation via boiling, evaporation, and condensation. |
| Purity Level | Removes some contaminants and impurities; retains beneficial minerals. | Highly pure; removes virtually all dissolved solids and impurities. |
| Mineral Content | Retains beneficial minerals like calcium and magnesium. | Removes all minerals, both beneficial and harmful. |
| Taste | Often preferred for drinking, as retained minerals can enhance flavor. | Known for a bland or flat taste due to the absence of minerals. |
| Cost & Convenience | Inexpensive and convenient for daily use. Requires regular filter replacements. | Can be expensive and energy-intensive to produce. Can be purchased or made with a countertop distiller. |
| Common Uses | Everyday drinking, cooking, coffee, and tea. | Laboratory experiments, medical sterilization, car batteries, and humidifiers. |
Health Implications and Best Uses
From a health perspective, the differences between Brita filtered water and distilled water are significant. Brita filtered water is generally considered more beneficial for regular hydration because it retains natural, healthy minerals. These minerals contribute to taste and are important for the body's electrolyte balance. Distilled water, while safe to drink, provides no mineral benefits. As the World Health Organization (WHO) has noted, demineralized water can potentially lead to health issues if consumed exclusively for extended periods without a mineral-rich diet.
For practical purposes, the choice depends on your application. For daily drinking, Brita is the clear choice. For appliances like CPAP machines, irons, or humidifiers, where mineral buildup can cause damage, distilled water is necessary. Additionally, distilled water is used in laboratory and medical settings where absolute purity is required. The EPA regulates municipal tap water, ensuring it is safe, but Brita filtration offers an extra layer of protection and improved taste, while distillation provides a level of purity beyond what is needed for daily consumption. For more information on drinking water standards, see the EPA website.
Conclusion
In summary, Brita filtered water is not the same as distilled water. The distinction lies in the purification method and the resulting water composition. Brita filters reduce specific contaminants while purposefully leaving in healthy minerals for better taste and daily consumption. Distillation, conversely, removes virtually everything, resulting in mineral-free water ideal for technical applications. Understanding these differences allows you to choose the right type of water for your health and household needs.