Purenex Multipure Aqua RO System User Manual

Page 26

California Department of Public Health

Certification / Registration

Facts About Arsenic

(in compliance with NSF

Standard 58)

Arsenic (abbreviated 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 a lab test. Public water utili-

ties must have their water tested for arsenic. You

can get the results from your water utility. If you

have your own well, you can have the water test-

ed. The local health department or the state envi-

ronmental health agency can provide a list of certi-

fied labs. The cost is typically $15 to $30.

Information about arsenic in water can be found on

the Internet at the US Environmental Protection

Agency website:

www.epa.gov/safewater/arsenic.html.

There are two forms of arsenic: pentavalent

arsenic (also called As(V), As(+5), and arsenate)

and trivalent arsenic (also called As(III), As(+3),

and arsenite). In well water, arsenic may be pen-

tavalent, trivalent, or a combination of both.

Special sampling procedures are needed for a lab

to determine what type and how much of each type

of arsenic is in the water. Check with the labs in

your area to see if they can provide this type of

service.

Reverse Osmosis (RO) systems are very effective

at removing pentavalent arsenic. However, RO

systems do not remove trivalent arsenic from water

very well. A free chlorine residual will rapidly con-

vert 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 chlo-

rine residual (also called chloramine) may not con-

vert all the trivalent arsenic. If you get your water

from a public water utility, contact the utility to find

out if free chlorine or combined chlorine is used in

the water system.

The Multipure MP750 Plus RO is designed to

remove only pentavalent arsenic. It will not convert

trivalent arsenic to pentavalent arsenic.

This treatment system was tested in a laboratory to

remove pentavalent arsenic. Under lab conditions,

as defined in NSF/ANSI Standard 58, the system

reduced 0.050 mg/l (ppm) pentavalent arsenic to

0.010 mg/l (ppm) (the USEPA standard for drinking

water) or less. The performance of the system

may be different at your installation. Have the

treated water tested for arsenic to check if the sys-

tem is working properly.

The RO component of the Multipure MP750 Plus

RO system must be replaced as indicated in the

Owner's Manual to ensure the system will continue

to remove arsenic and other contaminants. The

component identification and locations where you

can purchase the component are listed in the

installation/operation manual.

Multipure International

7251 Cathedral Rock Drive

Las Vegas, NV 89128

800.622.9206 · 702.360.8880

[email protected]