In this day and age, it seems like bottled water is becoming more and more popular. It has practically become the icon for healthy beverages. There are approximately 475 bottled water plants in the U.S., producing 600 brands of bottled water. It is estimated that one in six American households use bottled water as either the primary or only source of water. In California alone, residents consume over 33% of the bottled water that is sold.
In this module, we shall investigate the "virtues" of bottled water as well as its similarities and differences with the water you get from your household faucet.
Due to the large difference in price, most people want to know what the difference is between tap and bottled water. Just how much are Americans willing to pay for bottled water? In 1990, the average cost of bottled water and vended water in the U.S. was $0.90 per gallon. This may not seem like a lot to you, but it does when you compare it to the average cost of tap water in California: $0.80 per 500 gallons!
Bottled water can come from wells, springs, artesian wells, or the municipal water supply. It is regulated as a food product by the U.S. Food and Drug Administration (FDA). It is important to note that the FDA’s standards are essentially the same as those set by the U.S. Environmental Protection Agency (EPA), which regulates public water supplies. In some states, however, bottled water requirements are stricter than those for tap water are.
Tap water can come from surface water (lakes or streams) or groundwater. Unlike bottled water distributors, public water suppliers usually track cases of water-borne illness. Furthermore, if a contaminant exceeds EPA standards, public water suppliers are required to notify citizens of the contaminant, its level in the water supply, its health effects, and measures that can be taken to prevent illness.
Lastly, the tap water industry usually employs chlorine disinfection to guard against regrowth or re-entry of microorganisms, which may leave tap water not tasting as good as it would otherwise. Bottled water, on the other hand, utilizes ozone disinfection, which is tasteless and odorless.
How is bottled water regulated?
Bottled water was not always standardized. That is, water bottling
companies had the liberty to label their bottled water any way they pleased.
This all changed in 1996 when the FDA set standards that all bottled water
companies were required to follow. Some of the standards included:
Is bottled water really healthier than tap water?
One contributing factor to the popularity of bottled water is that people commonly believe that bottled water is "healthier" than tap water is. Calcium (Ca) and magnesium (Mg), in particular, are important minerals we would want in our water. Death rates tend to be lower in areas with tap water containing higher levels of Ca and Mg. It has been shown that deficiencies in magnesium are capable of producing heart disturbances, including 215,000 fatal heart attacks in the U.S. each year, and as many as 20,000,000 fatal heart attacks worldwide!
However, sources say that few brands of bottled water offer a significant
amount of minerals. Below is a comparison of calcium and magnesium
in bottled and tap water in a few major cities. The numbers represented
in this table are the percentages of FDA recommended daily intake per liter
Sources: FDA; city water department; bottled water companies
From these figures, it can be concluded that bottled and tap water can be equally "healthy" in terms of calcium and magnesium content, depending on where you live.
What is the difference between the different types of bottled water anyway?
Mineral water, still water, sparkling water, seltzer water and club soda, sterilized water, and distilled or de-mineralized water…. What do all of these have in common? They are all different types of bottled water. So what is the difference?
Mineral water is drawn from an underground source and contains at least 250 ppm of dissolved salts. Whichever minerals are present are what make mineral water what it is. Some minerals that may appear in mineral water include calcium, iron, and sodium.
Still water is water without the "fizz" caused by gas bubbles.
Ordinary tap water and bottled water in larger containers are examples
of still water.
Seltzer water is tap water that has been filtered and carbonated. Club soda is seltzer water with added mineral salts.
Sterilized water is used to make baby formula and is also drunk by people with immuno-compromised systems. It must be processed to meet FDA’s requirements for commercial sterility.
Distilled or de-mineralized water is usually tap water that has been treated to remove nearly all minerals and sodium that occur naturally in water.
"What is bottle maintenance?," you ask. After all that you know about tap and bottled water now, if you still think you prefer bottled water, it is important for you to take good care of the bottle from which you drink. Huh? Bacteria grow best in warm and moist environments. That means the environment created by an unrefrigerated bottle of water, once the seal has been broken, is the perfect place for bacteria to grow. This produces a plethora of unwanted health risks.
Here are some tips for bottle maintenance. Don’t forget to share them with your friends!
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