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is a word that is not very commonly used with confidence and certainity.
In this day and age, what products could be be pure? Water is no different
in this regard. Water is never found in a pure state in nature. Both groundwater
and surface water may contain many constituents, including microorganisms,
gases, inorganic and organic materials. But why is this? It's because
your water is changing as it moves about the planet.
chemical nature of water continually evolves as it moves through the hydrologic
cycle. The kinds of chemical constituents found in groundwater depend,
in part, on the chemistry of the precipitation and recharge water. Near
coastlines, precipitation contains higher concentrations of sodium chloride,
and downwind of industrial areas, airborne sulphur and nitrogen compounds
make precipitation acidic.
of the most important natural changes in groundwater chemistry occurs
in the soil. Soils contain high concentrations of carbon dioxide which
dissolves in the groundwater, creating a weak acid capable of dissolving
many silicate minerals. In its passage from recharge to discharge area,
groundwater may dissolve substances it encounters or it may deposit some
of its constituents along the way. The eventual quality of the groundwater
depends on temperature and pressure conditions, on the kinds of rock and
soil formations through which the groundwater flows, and possibly on the
residence time. In general, faster flowing water dissolves less material.
Groundwater, of course, carries with it any soluble contaminants which
When it comes to making the best choice
for our health, water that has been treated effectively with modern treatment
equipment and adhering to modern regulations is the best since there is
no 'pure' source of water available to us. Even
with remarkable natural purification processes at work, it's a safe bet
to keep the water you drink in your home safe with the use of a good water
filtration system, especially as most city's water pipes continue to age
and it is difficult for utilities to upgrade every component within a