By and large, you can see that illegal mining is playing a big role,” he said. But one of the sure ways is to ensure that this illegal mining stops,” he urged. The report found that kohl had the highest contamination rate, with 77.79% of samples testing positive for lead. The Upper East and Eastern regions recorded a 100% contamination rate for the product. Turmeric also recorded a 42.09% lead contamination rate, with the Greater Accra and Central regions topping the list.