Table 2a.

The concentration levels of heavy metals (mg/L) in fresh milk bought from dairy farms in Pretoria.

Samples	As	Cr	Cu	Fe	Mg	Mn	Ni	Pb	Se	Zn
A	0.029±0.017	0.024±0.017	0.010±0.004	0.268±0.032	3.355±0.363	0.008±0.001	0.003±0.005	0.072±0.079	0.035±0.041	0.185±0.012
B	0.029±0.017	0.008±0.007	0.012±0.004	0.282±0.038	3.631±0.379	0.007±0.001	0.004±0.005	0.018±0.002	0.021±0.023	0.293±0.034
C	0.026±0.018	0.007±0.008	0.012±0.004	0.278±0.020	3.384±0.255	0.008±0.001	0.004±0.006	0.020±0.004	0.015±0.016	0.309±0.036
D	0.025±0.015	0.005±0.008	0.011±0.004	0.239±0.022	3.597±0.221	0.007±0.001	0.003±0.005	0.016±0.003	0.012±0.013	0.180±0.008
E	0.018±0.018	0.001±0.022	0.011±0.003	0.297±0.017	3.897±0.204	0.008±0.001	0.006±0.008	0.018±0.003	0.025±0.032	0.197±0.020
F	0.021±0.010	0.004±0.010	0.009±0.003	0.346±0.046	3.731±0.207	0.007±0.001	0.004±0.006	0.021±0.004	0.013±0.015	0.200±0.052
G	0.019±0.011	0.004±0.010	0.011±0.005	0.305±0.019	3.859±0.214	0.007±0.001	0.003±0.004	0.022±0.003	0.013±0.015	0.220±0.079
Range	0.018±0.018–0.029±0.017	0.001±0.022–0.024±0.017	0.009±0.003–0.012±0.004	0.239±0.022–0.346±0.046	3.355±0.363–3.897±0.204	0.007±0.001–0.008±0.001	0.003±0.004–0.006±0.008	0.016±0.003–0.072±0.079	0.012±0.013–0.035±0.041	0.185±0.012–0.309±0.036
WHO Recommended limits	0.01	0.05	1.50	0.5	150	0.40	0.02	0.01	0.02	5.00