Arsenic is a naturally occurring deadly poison. It is in the food we eat, the water we drink and the air we breathe. A dose of around 200 mg is sufficient to kill you and it has recently become apparent that long-term exposure can cause a wide range of illnesses, including cancer. This paper reports on recent studies in north-east England, which reveal that soil arsenic concentrations are frequently above the Government's recently published guideline value of 20 mg/kg for residential areas. Though this in itself does not imply a significant health risk, it does show that more frequent and complex contaminated-ground risk assessments are likely to be needed in the UK generally.
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