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. Author manuscript; available in PMC: 2017 Oct 1.
Published in final edited form as: Environ Res. 2017 Jul 15;158:610–615. doi: 10.1016/j.envres.2017.07.018

Figure 2.

Figure 2

The ability of five tabletop water pitcher filters, listed by the brand name, to remove arsenic (100 μg/L) from soft water. Control represents ICP-MS measurements of the arsenic solution before it was added to the filters. Three lots of each filter were tested, 1 L/filter. *P<0.05 versus 100 μg/L **P<0.001, indicates that the ZeroWater® filter reduced the arsenic concentration in the filtrate to less than 0.05 μg/L. Data presented as the mean ± SEM. Effluent arsenic concentrations are: ZeroWater® (below detection, 100% removed by filtration), PUR® (65.2 ± 5.5 μg/L, 34.8% removed by filtration), Brita® (72.4 ± 7.7 μg/L, 27.6% removed by filtration), HDX® (81.8 ± 6.6 μg/L, 18.2% removed by filtration), and Great Value® (79.9 ± 2.4 μg/L, 20.1% removed by filtration).