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Arsenic Fact Sheet
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 your water utility contained with in your consumer confi dence report. If
you have your own well, you will need to have the water evaluated. The local health
department or the state environmental health agency can provide a list of test kits or
certifi ed labs.
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 aresenic 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)
may not convert all the trivalent arsenic. If you get your water from a public water utility,
contact the utility to fi nd out if free 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 depending on specifi c water quality conditions at the consumer’s
installation.
The RO component of this Premier reverse osmosis system must be maintained
according to its recommended maintenance cycle. Specifi c component identifi cation
and ordering information can be found in the installation/operation manual maintenance
section, by phone at 1-800-752-5581 or online www.premierh2o.com.
California Proposition 65 Warning
WARNING: This product contains chemicals known to the State of California to
cause cancer and birth defects or other reproductive harm.
For more information: Watts.com/prop65
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