. Author manuscript; available in PMC: 2014 May 16.

Published in final edited form as: Arch Environ Contam Toxicol. 2012 Dec 20;64(3):519–527. doi: 10.1007/s00244-012-9846-4

Table 3.

Serum levels of OCP in children from the Yaqui and Mayo valleys in Sonora, Mexico

Community	p,p′-DDE^a	p,p′-DDT^a	Lindane^a	Aldrin^a	Endosulfan^a
Yaqui valley (n = 100)
Bácum (n = 8)	0.54 (0.25–1.0)	0.25 (n = 1)^b	ND	ND	ND
Campo 5 (n = 18)	0.90 (0.50–3.0)	0.25 (n = 2)^b	0.50 (n = 2)^b	0.33 (0.25–0.5) (n = 3)^b	ND
SJ de Bácum (n = 27)	0.64 (0.25–2.5)	0.50 (n = 1)^b	0.28 (0.25–0.50) (n = 20)^b	0.25 (n = 4)^b	0.25 (n = 2)^b
Campo 47 (n = 22)	1.17 (0.25–8.0)	0.34 (0.25–0.50) (n = 8)^b	0.30 (0.25–0.50) (n = 17)^b	ND	0.25 (n = 2)^b
Tobarito (n = 13)	0.58 (0.25–1.0)	ND	ND	ND	ND
Cd. Obregón (n = 12)	0.65 (0.25–2.25)	0.25 (n = 1)^b	ND	ND	ND
Mayo valley (n = 53)
Etchojoa (n = 19)	2.2 (0.50–5.8)	0.52 (0.25–1.0) (n = 11)^b	0.30 (0.25–0.50) (n = 9)^b	0.38 (0.25–0.5) (n = 2)^b	0.25 (n = 2)^b
Villa Juárez (n = 17)	2.2 (0.25–10.3)	0.25 (n = 3)^b	0.25 (n = 6)^b	ND	ND
Navojoa (n = 17)	2.1 (0.50–7.8)	0.34 (0.25–0.75) (n = 12)^b	0.92 (0.25–1.0) (n = 6)^b	0.63 (0.25–0.75) (n = 6)^b	ND

ND nondetected

ppb (or μg/L)

Mean value of positive samples (n)