Table 2.
Pb Concentrations in the Drinking Water Samples Collected from the Four Newark Homes That Had Previously Reported Elevated Pb Levels in POU- or Pitcher-Filtered Watera
| Pb removed through POU or pitcher deviceb | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| house | total Pb that bypassed POU or pitcher filter (μg/L) | total Pb passing through POU or pitcher filter device (μg/L) | Pb passing 0.2 μm filter (μg/L) | Pb passing ultrafilter or soluble Pb (μg/L) | Pb particles removed by 0.2 μm filter (%) | Pb particles removed by ultrafilter (%) | total Pb (%) | particulate and colloidal Pb (%) | soluble Pb (%) |
| house 1 | 1300 | 45 | 6 | 6 | 88 | 87 | 97 | 97 | 74 |
| house 2 | 75 | 28 | 10 | 5 | 64 | 82 | 63 | 48 | 84 |
| house 3 | 727 | 22 | 4 | 4 | 82 | 82 | 97 | 97 | 87 |
| house 4 | 33 | 1 | 1 | 1 | 3 | 3 | 97 | 100 | 90 |
a
Total Pb in water that bypassed the POU or pitcher filters is compared to Pb size fractions passing the filters and respective removal percentages.
b
Removals determined from ultrafilter results.