Table 3 Spatial distribution of fluoride in water sources by division
Division | Asembo | Uyoma | Maranda | Nyang’oma | Usigu | Overall |
|---|---|---|---|---|---|---|
Mean [F]±SD | 0.92±0.46 | 1.39±0.84 | 0.69±0.42 | 1.00±0.59 | 0.78±0.66 | 0.85±0.67 |
Highest | 2.27 | 5.44 | 1.7 | 2.23 | 2.34 | 5.44 |
>3.0 ppm | - | 01(9.1%) | - | - | - | 1(0.8%) |
1.5-2.9 ppm | 3(8.6%) | 2(18.2%) | 2(4.5%) | 2(33.3%) | 5(16.7) | 14(10.9%) |
1.0-1.4 ppm | 9(24.3%) | 2(18.2%) | 6(13.6%) | 0(0.0%) | 4(13.3%) | 216(16.4%) |
0.5-0.9 ppm | 20(57.1%) | 3(27.5%) | 21(47.7%) | 3(50.0%) | 9(30.0%) | 56(43.8%) |
0-0.4 ppm | 5(14.3%) | 3(27.5%) | 15(34.1%) | 1(16.7%) | 12(40.0%) | 36(28.1%) |
Lowest | 0.17 | 0.01 | 0.02 | 0.2 | 0.11 | 0.01 |
% [F] > 1 ppm | 28.6 | 45.5 | 18.2 | 33.3 | 30 | 28.1 |
Sample size (n) | 37 | 11 | 44 | 6 | 30 | 128 |