Premier RO-PURE - Arsenic Fact Sheet

Page 19
Arsenic (As) is a naturally occurring contaminant found in many ground waters. Arsenic in
water has no color, taste or odor. It must be measured by an arsenic test kit or lab test.
Public water utilities must have their water tested for arsenic. You can obtain the results from
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well, you will need to have the water evaluated. The local health department or the state
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There are two forms of arsenic: pentavalent arsenic (also called As (V), As (+5)) and trivalent
arsenic (also called As (III), As (+3)). In well water, arsenic may be pentavalent, trivalent, or a
combination of both. Although both forms of arsenic are potentially hazardous to your health,
trivalent arsenic is considered more harmful than pentavalent arsenic.
RO systems are very effective at removing pentavalent arsenic. A free chlorine residual will
rapidly convert trivalent arsenic to pentavalent arsenic. Other water treatment chemicals
such as ozone and potassium permanganate will also change trivalent arsenic to pentavalent
arsenic. A combined chlorine residual (also called chloramine) where it does convert trivalent
arsenic to pentavalent arsenic, may not convert all the trivalent arsenic in to pentavalent
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chlorine or combined chlorine is used in the water system.
This Premier reverse osmosis system is designed to remove up to 98% of pentavalent arsenic.
It will not convert trivalent arsenic to pentavalent arsenic. Under laboratory standard testing
conditions, this system reduced 0.30 mg/L (ppm) pentavalent arsenic to under 0.010 mg/L
(ppm) (the USEPA standard for drinking water). Actual performance of the system may vary
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the independent laboratory standard testing conditions Premier has conducted additional
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reducing up to 67% of trivalent arsenic from the drinking water.
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the system. Replacement of the reverse osmosis component should be with one of identical
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found in the maintenance section of this manual, by phone at 1-800-752-5582 or online at
www.premierH2o.com
Arsenic Fact Sheet