Table 2.
The heavy metal concentrations (mean ± SD, N = 3, mg/L) of hand-dug well water sources of Kafta Humera Woreda.
| Heavy metals (mean ± SD) | Water sources | WHO [14] | ESA [15] | |||
|---|---|---|---|---|---|---|
| Kunama Adigoshu | Hagere Selam | May Woyni | Habesha Adigoshu | |||
| Iron | 0.97 ± 0.06 | 1.86 ± 0.24 | 0.33 ± 0.02 | 0.69 ± 0.08 | 0.3 | 0.3 |
| Copper | BDL | BDL | BDL | BDL | 0.5 | 2 |
| Zinc | BDL | BDL | BDL | BDL | 0.2 | 5 |
| Manganese | BDL | BDL | BDL | BDL | 0.5 | 0.5 |
| Cadmium | BDL | BDL | BDL | BDL | 0.01 | 0.01 |
| Lead | BDL | BDL | BDL | BDL | 0.01 | 0.01 |
| Chromium | BDL | BDL | BDL | BDL | 0.05 | 0.05 |
BDL: below detection limit; WHO: World Health Organization; ESA: Ethiopian Standard Agency.