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Table 2 Range of measured lead concentrations by cup

From: A pilot study to assess lead exposure from routine consumption of coffee and tea from ceramic mugs: comparison to California Safe Harbor Levels

Cup Name Lead Concentration (μg/L)
  Min Max Mean Median
Black Logo1 <0.2 0.2 0.18 0.2
Black Logo2 0.2 0.2 0.2 0.2
Green Decorative 0.8 8.6 2.05 1.45
Yellow Decorative 0.2 0.4 0.23 0.2
Red Decorative <0.2 0.3 0.21 0.2
Glass <0.2 0.3 0.2 0.2
  1. Concentrations reported to be below the limit of detection (<0.2 μg/L) were assumed to have a value of the limit of detection divided by the square root of two (0.1 μg/L) in statistical analyses