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The global bottled water market valuation grew by 7% in 2006 to reach a value of $60,938.1 million. The volume of bottled water grew by 8.1% in 2006 to 115,393.5 million liters. In 2011, the market is forecast to have a value of $86,421.2 million, an increase of 41.8% since 2006. In 2011, the market is forecast to have a volume of 174,286.6 million liters, an increase of 51% since 2006. The global rate of consumption more than doubled between 1997 and 2005.

Purified water is currently the leading global seller, with U.S. companies dominating the field, and natural spring water, purified water and flavored water being the fastest-growing market segments. The major criticism of bottled water concerns the bottles themselves. Individual use bottled water is generally packaged in Polyethylene terephthalate (PET). According to a NAPCOR study, PET water bottles account for 50% of all the PET bottles and containers collected by curbside recycling, and the recycling rate for water bottles is 23.4%, an increase over the 2006 rate of 20.1%. PET bottled water containers make up one-third of 1 percent of the waste stream in the United States. The International Bottled Water Association also reports that the average weight of a plastic bottle water was 13.83 grams in 2007, compared to 18.90 grams in 2000, representing a 26.7% decline. Pepsi-Co has since introduced a bottle weighing 10.9 grams and using 20 percent less plastic, which it says is the lightest bottle of its kind that is nationally distributed. An estimated 50 billion bottles of water are consumed per annum in the US and around 200 billion bottles globally.

Bottled water processed with distillation or reverse osmosis lacks fluoride ions which are sometimes naturally present in ground water. The drinking of distilled water may conceivably increase the risk of tooth decay due to a lack of this element. According to a 1999 NRDC study, in which roughly 22 percent of brands were tested, at least one sample contained chemical contaminants at levels above strict state health limits. Some of the contaminants found in the study could pose health risks if consumed over a long period of time. However, the NRDC report conceded that "most waters contained no detectable bacteria, and the levels of synthetic organic chemicals and inorganic chemicals of concern for which were tested were either below detection limits or well below all applicable standards." Meanwhile, a report by the Drinking Water Research Foundation found that of all samples tested by NRDC, "federal FDA or EPA limits were allegedly exceeded only four times, twice for total coliforms and twice for fluorides." The rate of total dissolved solids is sometimes 4 times higher in bottled mineral waters than in bottled tap ones.

Another study, conducted by the Goethe University at Frankfurt found that a high percentage of the bottled water, contained in plastic containers were polluted with estrogenic chemicals. Although some of the bottled water contained in glass were found polluted with chemicals as well, the researchers believe some of the contamination in the plastic containers may have come from the plastic containers themselves.

In the United States, bottled water costs between $0.25 and $2 per bottle while tap water costs less than US$0.01. In 1999, according to a NRDC study, U.S. consumers paid between 240 and 10,000 times more per unit volume for bottled water than for tap water. Typically 90 percent or more of the cost paid by bottled water consumers goes to things other than the water itself -- bottling, packaging, shipping, marketing, retailing, other expenses, and profit.

It is true that for some cases, tap water will cause health defects, but it is also true that some bottled waters will be more likely to cause health problems. Both bottle and tap water contain minerals and nutrients that can improve health, as well as contaminants that can cause diseases. The quality and content of water varies greatly by location and bottle brand. The tap water in South Africa is generally safe, but some alarming incidents have occured in recent years to cause concern. It is important to be aware of specific water content from the tap and in bottles if you have special dietary needs, a weakened immune system, or are pregnant because you can be more sensitive to effects from the bacterial content and mineral contaminants.

The Natural Resources Defense Council, Sierra Club and World Wildlife Fund have all urged their supporters to consume less bottled water. Anti-bottled water campaigns and organizations, such as Corporate Accountability International, typically argue that bottled water is no better than tap water, and emphasize the environmental side-effects of disposable plastic bottles. The Showtime series Penn & Teller: Bullshit! demonstrated, in a 2007 episode, that in a controlled setting, diners could not discern between bottled water and water from a garden hose behind the restaurant.

The recent documentary Tapped argues against the bottled water industry, asserting that tap water is healthier, more environmentally sustainable and more ecologically just than bottled water. The film focuses on the bottled water industry in the United States. The film has largely seen positive reviews, and has spawned college campus groups such as Beyond the Bottle.

Distillation removes all minerals from water, and the membrane methods of reverse osmosis and nanofiltration remove most to all minerals. This results in demineralized water which is not considered ideal drinking water. The World Health Organization has investigated the health effects of demineralized water since 1980. Experiments in humans found that demineralized water increased diuresis and the elimination of electrolytes, with decreased blood serum potassium concentration. Magnesium, calcium, and other minerals in water can help to protect against nutritional deficiency. Demineralized water may also increase the risk from toxic metals because it more readily leaches materials from piping like lead and cadmium, which is prevented by dissolved minerals such as calcium and magnesium. Low-mineral water has been implicated in specific cases of lead poisoning in infants, when lead from pipes leached at especially high rates into the water. Recommendations for magnesium have been put at a minimum of 10 mg/L with 20–30 mg/L optimum; for calcium a 20 mg/L minimum and a 40–80 mg/L optimum, and a total water hardness (adding magnesium and calcium) of 2 to 4 mmol/L. At water hardness above 5 mmol/L, higher incidence of gallstones, kidney stones, urinary stones, arthrosis, and arthropathies have been observed. Additionally, desalination processes can increase the risk of bacterial contamination. Manufacturers of home water distillers, of course, claim the opposite -- that minerals in water are the cause of many diseases, and that most beneficial minerals come from food, not water. They quote the American Medical Association as saying "The body's need for minerals is largely met through foods, not drinking water." The WHO report agrees that "drinking water, with some rare exceptions, is not the major source of essential elements for humans" and is "not the major source of our calcium and magnesium intake", yet states that demineralized water is harmful anyway. "Additional evidence comes from animal experiments and clinical observations in several countries. Animals given zinc or magnesium dosed in their drinking water had a significantly higher concentration of these elements in the serum than animals given the same elements in much higher amounts with food and provided with low-mineral water to drink."

Mechanical pressure is applied to an impure solution to force pure water through a semi-permeable membrane. Reverse osmosis is theoretically the most thorough method of large scale water purification available, although perfect semi-permeable membranes are difficult to create. Unless membranes are well-maintained, algae and other life forms can colonize the membranes.

Distillation involves boiling the water to produce water vapour. The vapour contacts a cool surface where it condenses as a liquid. Because the solutes are not normally vaporised, they remain in the boiling solution. Even distillation does not completely purify water, because of contaminants with similar boiling points and droplets of unvapourised liquid carried with the steam. However, 99.9% pure water can be obtained by distillation.

Water is heated hot enough and long enough to inactivate or kill micro-organisms that normally live in water at room temperature. Near sea level, a vigorous rolling boil for at least one minute is sufficient. At high altitudes (greater than two kilometres or 5000 feet) three minutes is recommended.[18] In areas where the water is "hard" (that is, containing significant dissolved calcium salts), boiling decomposes the bicarbonate ions, resulting in partial precipitation as calcium carbonate. This is the "fur" that builds up on kettle elements, etc., in hard water areas. With the exception of calcium, boiling does not remove solutes of higher boiling point than water and in fact increases their concentration (due to some water being lost as vapour). Boiling does not leave a residual disinfectant in the water. Therefore, water that has been boiled and then stored for any length of time may have acquired new pathogens.

This is a method of reducing the effects of hard water. Hardness salts are deposited in water systems subject to heating because the decomposition of bicarbonate ions creates carbonate ions that crystallise out of the saturated solution of calcium or magnesium carbonate. Water with high concentrations of hardness salts can be treated with soda ash (sodium carbonate) which precipitates out the excess salts, through the common-ion effect, producing calcium carbonate of very high purity. The precipitated calcium carbonate is traditionally sold to the manufacturers of toothpaste. Several other methods of industrial and residential water treatment are claimed (without general scientific acceptance) to include the use of magnetic or/and electrical fields reducing the effects of hard water.

Ultraviolet light is very effective at inactivating cysts, as long as the water has a low level of colour so the UV can pass through without being absorbed.

O3 is an unstable molecule, a "free radical" of oxygen which readily gives up one atom of oxygen providing a powerful oxidizing agent which is toxic to most waterborne organisms. It is a very strong, broad spectrum disinfectant that is widely used in Europe. It is an effective method to inactivate harmful protozoa that form cysts. It also works well against almost all other pathogens. Ozone is made by passing oxygen through ultraviolet light or a "cold" electrical discharge. To use ozone as a disinfectant, it must be created on-site and added to the water by bubble contact. Some of the advantages of ozone include the production of fewer dangerous by-products (in comparison to chlorination) and the lack of taste and odour produced by ozonation. Although fewer by-products are formed by ozonation, it has been discovered that the use of ozone produces a small amount of the suspected carcinogen bromate, although little bromine should be present in treated water. Another of the main disadvantages of ozone is that it leaves no disinfectant residual in the water. Ozone has been used in drinking water plants since 1906 where the first industrial ozonation plant was built in Nice, France. The U.S. Food and Drug Administration has accepted ozone as being safe; and it is applied as an anti-microbiological agent for the treatment, storage, and processing of foods.

The most common disinfection method involves some form of chlorine or its compounds such as chloramine or chlorine dioxide. Chlorine is a strong oxidant that rapidly kills many harmful micro-organisms. Because chlorine is a toxic gas, there is a danger of a release associated with its use. This problem is avoided by the use of sodium hypochlorite, which is a relatively inexpensive solution that releases free chlorine when dissolved in water. Chlorine solutions can be generated on site by electrolyzing common salt solutions. A solid form, calcium hypochlorite exists that releases chlorine on contact with water. Handling the solid, however, requires greater routine human contact through opening bags and pouring than the use of gas cylinders or bleach which are more easily automated. The generation of liquid sodium hypochlorite is both inexpensive and safer than the use of gas or solid chlorine. All forms of chlorine are widely used despite their respective drawbacks. One drawback is that chlorine from any source reacts with natural organic compounds in the water to form potentially harmful chemical by-products trihalomethanes (THMs) and haloacetic acids (HAAs), both of which are carcinogenic in large quantities. The formation of THMs and haloacetic acids may be minimized by effective removal of as many organics from the water as possible prior to chlorine addition. Although chlorine is effective in killing bacteria, it has limited effectiveness against protozoa that form cysts in water (Giardia lamblia and Cryptosporidium, both of which are pathogenic).

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Angeldelta

Angeldelta is a family owned business which distributes of water purification systems and sandstone building products.

Clean drinking water is a basic human need, and right. However, there are limits to the level of control one can exercise over the quality your drinking water. Come with us as we explore this important subject.

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