Element | Town (n) | ADD mg/Kg/day | HQ (mean min–max) | % HQ > 1 above | Confidence Interval (α = 0.95) |
Arsenic | Bacanuchi (20) | 1.91E−05 | 1.3 (0.3 - 2.8) | 45 | 23 - 68.4 |
Arizpe (24) | 6.25E−06* | 0.4 (0.1 - 0.7) | 0 | ------- | |
Aconchi (25) | 1.33E−05 | 1.0 (0.2 - 4.0) | 34 | 21.1 - 61.3 | |
Baviácora (22) | 1.98E−05 | 1.3 (0.4 - 2.9) | 77 | 56.4 - 92.1 | |
Ures (26) | 1.63E−05 | 1.1 (0.3 - 2.9) | 57 | 36.9 - 76.6 | |
Total (117) | 1.47E−05 | 1.0 (0.1 - 4.0) | 42 | 34.4 - 53 | |
Mercury | Bacanuchi (20) | 1.34E−05* | 2.7 (0.7 - 5.9) | 80 | 56.3 - 94.2 |
Arizpe (24) | 5.27E−06 | 1.0 (0.3 - 1.7) | 58 | 36.6 - 77.8 | |
Aconchi (25) | 5.71E−06 | 1.3 (0.3 - 5.1) | 64 | 42.5 - 82 | |
Baviácora (22) | 6.77E−06 | 1.3 (0.4 - 3.0) | 77 | 54.6 - 92.1 | |
Ures (26) | 5.63E−06 | 1.1 (0.3 - 3.0) | 57 | 36.9 - 76.6 | |
Total (117) | 7.06E−06 | 1.4 (0.3 - 5.9) | 67 | 57.3 - 75.1 |