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Did
you know?
Reverse osmosis is the finest water filtration method known. This process will
allow the removal of particles as small as ions from a solution. It is used
to purify water and remove salts and other impurities in order to improve the
color, taste or properties of the fluid. R.O. uses a membrane that is semi-permeable,
allowing the fluid that is being purified to pass through it, while rejecting
other ions and contaminants from passing.
This technology uses a process
known as crossflow to allow the r.o. membrane to continually clean itself. This
is the reason of why an r.o. element can last many years before clogging or
need replacement. This
water purification process requires a driving force to push the fluid through
the membrane, and the most common force is household water pressure or pressure
from a booster pump. The higher the pressure, the larger the driving force and
efficiency.
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Water
And Health
Will
drinking water influence my sodium levels?
As we grow
older our bodies need regular maintenance and observation, particularly
regarding our heart. For many individuals monitoring their sodium intake
is vital to a healthy heart and a lengthy and productive life. Here are
some simple questions and answers regarding sodium intake and your drinking
water.
Should I
be concerned about sodium in my drinking water? No. Sodium levels in drinking
water from most public water systems are unlikely to be a significant
contribution to adverse health effects. How much does water contribute
to sodium in my diet?
A Food and
Drug Administration publication, "Scouting for Sodium and Other Nutrients
Important to Blood Pressure" (FDA 95-2284) states that most American adults
tend to eat between 4,000 and 6,000 mg of sodium per day, "and therapeutic
sodium restricted diets can range from below 1,000 mg to 3,000 mg per
day."
It lists
the following nutrient guidelines for food labeling:
- Low-sodium:
140 mg or less per serving (or, if the serving is 30 g or less or two
tablespoons or less, 140 mg or less per 50 g of the food)
- Very low-sodium:
35 mg or less per serving (or, if the serving is 30 g or less or two
tablespoons or less, 35 mg or less per 50 g of the food)
- Sodium-free:
Less than 5 mg per serving
In a National
Inorganics and Radionuclides Survey, conducted by EPA in the mid-1980s,
about 3/4 of 989 water systems included had concentrations of sodium of
less that 50 mg/l. Assuming that an adult weighing 70 kilograms (about
150 pounds) drinks two liters (about 8 glasses) per day, he or she would
typically ingest less than 100 mg of sodium per day from drinking water.
Based on
this data, a 1/4-liter serving (about an 8-ounce glass) would contain
less than 12.5 mg of sodium, well within FDA's "very low sodium" category.
It is important to note that sodium is an essential nutrient. The Food
and Nutrition Board of the National Research Council recommends that most
healthy adults need to consume at least 500 mg/day, and that sodium intake
be limited to no more than 2400 mg/day.
Is it necessary
to buy bottled water instead of using tap water? It is not necessary to
switch to bottled water to maintain a healthy, low-sodium diet. Levels
of sodium in a serving of drinking water are very low in most water systems.
Also, FDA
imposes quality standards for bottled water that are equivalent to EPA's
drinking water standards. To reduce the risks of adverse health effects
due to sodium, consult a physician or registered dietitian to plan a healthy
diet that reduces the sodium content in your total food intake.
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