Bottled Water: How Safe?
Bottled water, once a rarity, is
now found everywhere,
in homes, offices, stores, airplanes, and restaurants. In 2006, over eight
billion gallons of bottled water was consumed across the globe. By 2007, the
consumption in the US alone amounted to 8.8 billion gallons or 29
gallons per person. Bottled water was the second most consumed beverage in
the US after carbonated soft drinks.
Over the past two
decades, people have increasingly been shifting to bottled water because
they consider it safe, find it refreshing, calorie-free, convenient to carry
around, tastier than some tap water and healthier than soft drinks. But more
and more people are questioning whether the water, and the package it comes
in, is safe, or at least safer than tap water -- and if the convenience is
worth the environmental impact.
Why is the demand for bottled water growing?
Most people have bottled water because
- They consider bottled water safer than tap water.
- It is portable and easy to carry.
- It is refreshing
- It is considered good for health.
Tap water may be contaminated by a range of
chemical, microbial and physical hazards that could pose risks to health if
they are present at high levels. Examples of chemical hazards include lead,
arsenic and benzene. Microbial hazards, include bacteria, viruses and
parasites, such as Vibrio cholerae, hepatitis A virus, and Crytosporidium
parvum, respectively. Physical hazards include glass chips and metal
fragments. Because of the large number of possible hazards in
drinking-water, the development of standards for drinking-water requires
significant resources and expertise, which many countries are unable to
afford.
Some useful information
- Tap water vs bottled water
-- There is a common belief that botted water is better than tap waster.
Though it might be true in developing countries, it is not the case in
many developed countries. A four-year survey of the bottled water
industry conducted by Natural Resources Defense Council (NRDC) in Canada
revealed that one-third of the bottled water tested contained levels of
contamination which exceeded allowable limits under either state or
bottled water industry standards or guidelines. The survey also observed
that an estimated 25 percent or more of bottled water was just tap water
in a bottle -- sometimes further treated, sometimes not
- Know your water -- To
determine bottled water is really just tap water, check if the bottle
label or the cap says "from a municipal source" or "from a community
water system".
- Containments in bottled water -- During the survey NRDC found most bottled water relatively free of contaminants. The survey opined that the the "spotty" quality of products of some brands might "pose a health risk, primarily for people with Weakened immune systems (such as the frail elderly, some infants, transplant and cancer patients, or people with HIV/AIDS)." About 22 percent of the brands they tested contained, in at least one sample, chemical contaminants at levels above strict state health limits. If consumed over a long period of time, some of these contaminants could cause cancer or other health problems.
- Health risk from plastic in water bottles
-- Recent research conducted by NRDC revealed the presence of chemicals
called phthalates, which are known to disrupt testosterone and other
hormones, and can leach into bottled water over time. One study found
that water that had been stored for 10 Weeks in plastic and in glass
bottles contained phthalates, suggesting that the chemicals could be
coming from the plastic cap or liner. Incidentally, there are regulatory
standards limiting phthalates in tap water and there are no legal limits
for phthalates in bottled water. The US bottled water industry waged a
successful campaign opposing the FDA proposal to set a legal limit for
these chemicals.
To improve safety of bottled water
- Initiatives should be taken by citizens to
urge their concerned governments to adopt strict requirements for
bottled water safety, labeling, and public disclosure. Citizens should
specifically request for --
- Setting of strict limits for contaminants of
concern in bottled water, including arsenic, heterotrophic-plate-count
bacteria, E. coli and other parasites and pathogens, and synthetic
organic chemicals such as "phthalates".
- Ensuring the application of rules to all
types of bottled water -- including carbonated water and those sold
intrastate or interstate
- Setting regulations that require bottlers to
display information on their labels about the levels of contaminants of
concern found in the water, the water's exact source, how it has been
treated, and whether it meets health criteria set by the concerned
environmental protection agency and the disease control agency for
killing parasites like cryptosporidium.
Bottled Water and the Environment
- In 2006, the equivalent of 2 billion half-litre
bottles of water Were shipped to U.S. ports. In New York City alone, the
transportation of bottled water from Western Europe released an
estimated 3,800 tons of global warming pollution into the atmosphere. In
California, 18 million gallons of bottled water Were shipped in from
Fiji in 2006, producing about 2,500 tons of global warming pollution.
- And while the bottles come from far away,
most of them end up close to home -- in a landfill. Most bottled water
comes in recyclable PET plastic bottles, but only about 13 percent of
the bottles We use get recycled.
- Plastics travel through our sewage system
and land up in the oceans. This poses a huge threat to marine life. To a
sea turtle, a floating plastic bag looks like a jellyfish. And plastic
pellets, the small hard pieces of plastic from which plastic products
are made, look like fish eggs to seabirds. Drifting nets entangle birds,
fish and mammals, making it difficult, if not impossible to move or eat.
As our consumption of plastic mounts, so too does the danger to marine
life.
The Negative Impact of Bottled Water on Health
- Bottled water is stored for longer periods
and at higher temperatures than water distributed in piped distribution
systems. As a result, some micro-organisms, which are normally of little
or no public health significance, may grow to higher levels in bottled
waters. These organisms appear to have little or no growth in tap water
and in water bottled in glass containers as against stagnant water and
water bottled in plastic containers.
- Chances are ordinary tap water has been added to used mineral water bottles and sold as the original article.
- The plastic used in both single-use and
reusable bottles can be more of a contamination threat than the water. A
safe plastic made of #1 polyethylene terephthalate (PET or PETE) is
supposed to be used only once. HoWever, it is often reused and chemicals
such as DEHA, a known carcinogen, and benzyl butyl phthalate (BBP), a
potential hormone disrupter.
- There is a school of thought which advocates
that even reusable water bottles should not be used. They question the
safety of bisphenol A (BPA), a hormone-disrupting chemical known to
leach out. Studies show that even extremely low doses of the chemical
can be damaging. Research has linked the chemical to a variety of
disorders, including obesity and breast cancer, birth defects and
miscarriages.
- The excessive use of bottled water (which
often does not have added Flouride unlike tap water) may mean users
won't get enough fluoride to build strong teeth and prevent decay
Bottled Water and Benefits to Health
In European countries, many consumers believe
that natural mineral waters have medicinal properties or offer other health
benefits. Such waters are typically of high mineral content and, in some
cases, significantly above the concentrations normally accepted in
drinking-water. Such waters have a long tradition of use and are often
accepted on the basis that they are considered foods rather than
drinking-water per se. Although certain mineral waters may be useful in
providing essential micro-nutrients, such as calcium, the World Health
Organization (WHO) is unaware of any convincing evidence to support the
beneficial effects of consuming such mineral waters.
It should be noted
that neither the CAC nor WHO offer certification of any bottled or mineral
water.
