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Table 1 Distribution of leachable lead concentration in the various types of source for children with B-Pb ≥ 25 μg/L.

From: Identification of sources of lead exposure in French children by lead isotope analysis: a cross-sectional study

   

Quantile

  

Type of source (n)

Unit

LOQ

Min

25%

50%

75%

90%

Max

Mean

Geometric Mean

Tap water (124)

μg/L

1

0.5

0.5

0.5

2.75

7.5

74

4.1

1.3 (1.03-1.6)

Home dust (469)

μg/m 2

1

0.5

5

11

26

66

3204

42.7

12 (10.7-13.6)

Dust from communal

areas (57)

μg/m 2

1

4

13

26

64.5

306

1103

94.3

33.7 (24.1-47.1)

Outdoor soil (81)

mg/kg

0.5

2.1

13.9

29

81.6

169

395

66.2

33.9 (26.2-43.8)

Wipe of outdoor ground (13)

μg/m 2

1

7

26.5

115

181

2132

3172

361.5

87.6 (31.6-243)

House paint (27)

mg/g

0.05

0.03

2.5

14

54.2

102

149

33.1

9.84 (4.2-22.9)

  1. France, 2008-2009.
  2. a) Data not shown for unusual sources
  3. b) Concentrations for samples below the limit of quantification (LOQ) were replaced by LOQ/2.