Jump to main content.


  Environmental Technology Verification Report, Removal of Chemical and Microbial Contaminants From Drinking Water, Watts Premier, Inc., M-2400 Point-of-Entry Reverse Osmosis Drinking Water Treatment System (PDF) (62 pp, 1.41 MB) (EPA/600/R-06/101) September 2006
Verification Statement (PDF) (6 pp, 176 KB)

The Watts Premier M-2400 Point-of-Entry Reverse Osmosis (RO) Drinking Water Treatment System was tested at the NSF Drinking Water Treatment Systems Laboratory for removal of the:

  • Viruses fr and MS2
  • Bacterium Brevundimonas diminuta
  • Chemicals aldicarb, benzene, cadmium, carbofuran, cesium, chloroform, dichlorvos, mercury, methomyl, mevinphos, oxamyl, paraquat, sodium fluoroacetate, strontium, and strychnine

The microorganisms used in this study served as surrogates for pathogenic bacteria and viruses that may be introduced into drinking water through accidental or intentional contamination. The target chemical challenge concentration was 1 milligram per liter (mg/L). The target microorganism challenge concentrations were 1x106 colony-forming units per 100 milliliters (CFU/100 mL) for B. diminuta and 1x104 plaque-forming units per milliliter (PFU/mL) for the viruses.

NSF also separately tested an optional post-membrane activated carbon filter that Watts Premier offers, the Flowmatic MAXVOC FF-975. This filter was tested with only the chemicals not removed to 20 micrograms per liter (µg/L) or lower by the RO membrane. One M-2400 system and one MAXVOC FF-975 carbon filter were tested. Each challenge was 30 minutes long. The M-2400 removed a minimum of 2.9 log10 of the viruses and 2.5 log10 of B. diminuta. The M-2400 removed all of the chemicals by 96 percent or more, except for mercury, which was removed by only 38 percent.

Following the M-2400 chemical challenge results, the MAXVOC FF-975 filter was challenged with chloroform, dichlorvos, mercury, and methomyl. The MAXVOC FF-975 removed 96 percent or more of each of the four chemicals.

The M-2400 and MAXVOC FF-975 together removed 99 percent or more of all chemicals except sodium flouroacetate, for which percent reduction was limited by its high detection limit of 20 µg/L.


Jeff Adams

You will need Adobe Reader to view some of the files on this page.
See EPA's PDF page to learn more.

Office of Research & Development | National Risk Management Research Laboratory

Local Navigation

Jump to main content.