Table 3.

Total Hg concentration in hair samples from Amazon populations living in communities located in the Tapajós River basin, 1994–2003.

Location	Region	N	Hg-total $\overline{X}$ (min-max) (μg / g) (*)	Reference
Itaituba	Tapajós	125	20.1 (0.8 – 151.2)	Akagi et al. 1994
Itaituba	Tapajós	51	30.3 ± 15.9	Akagi et al. 1995
Jacareacanga Brasília Legal	Tapajós	-	25.0 (− 151.0)	Malm et al. 1995
Brasília Legal	Tapajós	96	12.9	Lebel et al. 1997
	Tapajós	432	17.0 (− 176.0)	Malm et al. 1997
Cametá	Tapajós	68	10.8 ± 6.1	Dolbec et al. 2000
São Luiz do Tapajós	Tapajós	256	20.9 ± 12.2 (0.10 – 94.5)	Santos et al. 2000
Brasília Legal	Tapajós	152	11.3 ± 7.3 (0.70 – 37.2)	Santos et al. 2000
São Luiz do Tapajós	Tapajós	32	14.7 ± 7.2 (1.9 – 29.9)	Pinheiro et al. 2003
Barreiras	Tapajós	37	15.3 ± 9.3 (3.3 – 35.6)	Pinheiro et al. 2003

^(*)Original values rounded to the first decimal.