Researchers have advised against mining stones near homes and schools because of the dangerous levels of cancer-causing radiation found in some quarries.
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The four Kenyatta University researchers tested quarries in Nyamira and found more than 80 per cent of them exceeded safe levels.
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One quarry emitted ionising radiation that was 245 per cent higher than the limits recommended by the World Health Organization.
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This causes a health risk to quarry workers and the general public, the researchers say in their study, published last month in Heliyon, an open access scientific journal.
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Dr Peterson Warutere, an environmental health expert who supervised the study, told the Star the highest risk is to quarry workers.
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The high level of radioactive emissions recorded from the quarries may be due to materials not already mined, hence the fear of spread would be low. However exposure to quarry workers would be significant, and indeed it is, he said.
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Researchers have advised against mining stones near homes and schools because of the dangerous levels of cancer-causing radiation found in some quarries.nbsp
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One quarry emitted ionising radiation that was 245 per cent higher than the limits recommended by the World Health Organization.nbsp
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The high level of radioactive emissions recorded from the quarries may be due to materials not already mined, hence the fear of spread would be low. However exposure to quarry workers would be significant, and indeed it is, he said.nbsp
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The KU researchers noted that in the 2016 Nyamira County Hospital health records, cases of radiation-related sicknesses such as cancers, respiratory diseases, eye, and skin problems and dehydration among quarry workers and neighbouring community members accounted for 21 to 23 per cent of the disease burden.
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The miners can reduce the risk by wearing masks and wetting the dust before work.
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Dr Warutere said houses built using mined stones are not dangerous, if they have low levels.
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