Mercury is a toxic substance. Exposure to mercury may result in severe damage to the nervous and reproductive systems and may ultimately be fatal. Common symptoms of mercury poisoning are poor coordination and altered sensory perception. Pregnant women and children are especially vulnerable to mercury exposure. The most common cause of mercury poisoning in the United States is the consumption of fish contaminated with methylmercury. For this reason, EPA sets a maximum contaminant level for mercury in drinking water and works with the states to issue consumption advisories.
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