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Table 1

Pitcher-style water purifiers used in this study, measured contact time in seconds per L (the length of time for 1 L of tap water to percolate through each filter cartridge), components of the filter cartridge listed by the manufacturer, and dry weight of the cartridge

PurifierBrand ‘A’Brand ‘B’Brand ‘C’
Contact time (seconds/L) 125.9 ± 2.41 230.9 ± 7.30 374.0 ± 2.41 
Identifier for this report 126-purifer 231-purifier 374-purifier 
NSF/ANSI Certification Standards #42 & #53 #42 & #53 #42 
Activated carbon base Coconut ‘Blend’ ‘Blend’ 
Ion exchange Yes Yes Yes 
Coarse filter Yes 
Distributor to slow water Yes 
Membrane Yes 
Organization of components Mixture of granules Vertical rings Layered horizontally 
Dry weight (g) 83.4 ± 0.07 129.78 ± 2.02 451.27 ± 6.98 
PurifierBrand ‘A’Brand ‘B’Brand ‘C’
Contact time (seconds/L) 125.9 ± 2.41 230.9 ± 7.30 374.0 ± 2.41 
Identifier for this report 126-purifer 231-purifier 374-purifier 
NSF/ANSI Certification Standards #42 & #53 #42 & #53 #42 
Activated carbon base Coconut ‘Blend’ ‘Blend’ 
Ion exchange Yes Yes Yes 
Coarse filter Yes 
Distributor to slow water Yes 
Membrane Yes 
Organization of components Mixture of granules Vertical rings Layered horizontally 
Dry weight (g) 83.4 ± 0.07 129.78 ± 2.02 451.27 ± 6.98 

‘X’ indicates that the component was not listed as a filter cartridge component. Values of contact time are mean ± 1 SE of 3 separate filter cartridges.

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