Millennium
Reverse Osmosis Drinking Water System
Model MRO-35
PERFORMANCE DATA SHEET
Tested and Certified by NSF International against
NSF/ANSI Standard 58 for the reduction of:
Arsenic (Pentavalent), Barium, Cadmium, Chromium
(Hexavalent), Chromium (Trivalent), Copper, Cyst, Fluoride,
Lead, Nitrate, Nitrite, Radium 226/228, Selenium and TDS.
This reverse osmosis system contains replaceable treatment components critical for effective performance. It is the user’s responsibility to, and
the manufacturer strongly recommends that the user, periodically test the product water to verify that system is performing satisfactorily.
A note for systems with the Water Quality Monitor:
The Water Quality Monitor has been integrated into the system cover for instant monitoring at the touch of a button. The monitor compares
the level of the total dissolved solids in the incoming (feed) water versus the product water and calculates the percent rejection. The monitor is
preset to indicate a level of 75% rejection. NSF/ANSI Standard 58 requires a 75% total dissolved solids rejection to pass the requirement of the
standard.
A green light indicates that the percent rejection is at or above the set (desired) value and that the system is producing quality water.
An amber light indicates that the product water quality is less than acceptable. Because the Water Quality Monitor was designed to operate best
while the system is making water, a false reading may occur if tested when your R.O. drinking water system is not making water. Please empty
the storage tank, wait 15 minutes for the system to begin making water, and test your water quality again. If the Water Quality Monitor light is
still amber, change the 9 volt battery and test your water quality again. If the Water Quality Monitor light is still amber, please contact a water
treatment professional for service. The Water Quality Monitor requires a 9 volt battery, which is included.
If Millennium replacement filters and membranes are not used, health related contaminant reduction claims are invalid.
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ADDITIONAL STATE OF IOWA INFORMATION
REduCtIon PERfoRMAnCE
test Parameters: 750 mg/l T.D.S.; 7.5 0.5 pH; < 1 NTU; 77° 2°F; 50 psig
Influent
Effluent
Minimum
% Rejection
EPA MCL2
(avg. mg/l)1
(max. mg/l)1
(mg/l)1
FOR IOWA USE ONLY
Seller Name
Arsenic (Pentavalent)3
Barium
0.30
9.4
0.012
0.84
96
91
0.010
2.0
Cadmium
0.030
0.29
0.32
3.0
8.6
0.0006
0.033
0.022
0.066
0.5
98
88
93
97
0.005
0.1
0.1
1.3
4.0
Address
Chromium (Hexavalent)
Chromium (Trivalent)
Copper
Phone
Fluoride
94
Lead
0.15
28
2.8
25 pCi/l
0.099
750
0.003
7.8
0.83
5 pCi/l
0.004
65
98
72
70
80
96
91
99.99
0.015
10.0
1.0
5 pCi/l
0.05
NA
Nitrate (as N)4
Nitrite (as N)4
Radium 226/2285
Selenium
Seller Signature
Customer Signature
Date
Total Dissolved Solids
Cyst
(Signatures required prior to sale
only in Iowa and signed sheet to be
retained by seller for two years.)
170,000 #/ml
14 #/ml
1 Unless otherwise indicated.
2 USEPA Maximum Contaminant Level or Action Level.
3 See Arsenic Facts section.
4 This system is acceptable for treatment of influent concentrations of no more than 27 mg/L nitrate and 3 mg/L nitrite in combination measured as N and is certified
for nitrate/nitrite reduction only for water supplies with a pressure of 280 kPa (40 psig) or greater.
5 The reduction of Radium was verified by using Barium as a surrogate under NSF/ANSI Standard 58.
NA=Not Applicable.
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Arsenic Facts
Arsenic (As) is a naturally occurring contaminant found in many ground waters. It generally
occurs in two forms (valences or oxidation states): pentavalent arsenic (also known as
As(V), As(+5), or arsenate) and trivalent arsenic (also known as As(III), As(+3), or arsenite).
In natural ground water, arsenic may exist as trivalent arsenic, pentavalent arsenic, or a
combination of both. Although both forms of arsenic are potentially harmful to human health,
trivalent arsenic is considered more harmful than pentavalent arsenic. More information about
arsenic and its toxicity can be found on the U.S. Environmental Protection Agency website at:
This system is designed to remove only pentavalent arsenic. This treatment system does not
provide a feature for conversion of trivalent arsenic to pentavalent arsenic. The system may
remove some trivalent arsenic; however, it has not been evaluated for its ability to remove
trivalent arsenic.
Trivalent arsenic is generally more difficult to remove from drinking water than pentavalent arsenic.
Trivalent arsenic can be converted to pentavalent arsenic in the presence of an effective oxidant
such as free chlorine. The arsenic in water containing detectable free chlorine or that has been
treated with another effective oxidant will be in the pentavalent arsenic form. Treatment with
chloramine (combined chlorine) is not sufficient to ensure complete conversion of trivalent arsenic
to pentavalent arsenic.
Consumers using public water supplies can contact their utility to verify whether free chlorine
treatment chemicals are being used. Private water supplies and waters that do not have detectable
free chlorine residuals should be analyzed to determine the form(s) of arsenic present and the
potential need for oxidation of trivalent arsenic to pentavalent arsenic.
Arsenic does not generally impart color, taste or smell to water, therefore, it can only be detected
by a chemical analytical test. Public water supplies are required to monitor treated water for total
arsenic (trivalent arsenic plus pentavalent arsenic) and the results are available to the public from
the utility. Consumers using private water sources will need to make arrangements for testing. A
total arsenic test usually costs about $15-$30 and it is recommended the test be conducted by
a certified laboratory. Local health departments or environmental protection agencies can help
provide consumers with a list of certified laboratories. Some laboratories may also be able to analyze
specifically for (speciate) the two forms of arsenic present in a water sample if requested.
This treatment system was tested under laboratory conditions as defined in NSF/ANSI 58 Reverse
Osmosis Drinking Water Treatment Systems and was found to reduce 0.30 mg/L influent arsenic
challenge concentration in the test water to less than 0.010 mg/L, under standard testing
conditions. Actual performance of the system may vary depending on specific water quality
conditions at the consumer’s installation. Following installation of this system, the consumer
should have the treated water tested for total arsenic to verify arsenic reduction is being achieved
and the system is functioning properly.
The pentavalent arsenic removal component of this system (the R.O. membrane) must be replaced
at the end of its useful life. Typical membrane life expectancy is three years. Local conditions may
dictate more frequent changes. For replacement parts contact the local dealer who supplied the
unit or contact the factory for the dealer nearest you.
HELLENBRAND, INC.
404 Moravian Valley Road
Waunakee, Wisconsin 53597-0187
Form No. S1473-HB
Updated 07/25/07
Phone (608) 849-3050
Fax (608) 849-7398
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