Mercury is an element and a metal that is found in air, water, and soil. Elemental mercury … Some have 0.01% Thimerosal, or 50 mcg mercury per 0.5 mL dose, metabolized in the body to ethylmercury. Mercury is a toxic element and serves no beneficial physiological function in man; a maximum acceptable concentration of 0.001 mg/L (1 µg/L) in drinking water has therefore been established. Mercury. You can find your annual public drinking water supply report, called a Consumer Confidence Report, by contacting your water company. What is the maximum contaminant level of mercury allowed in public drinking water? It is also found in some products. Now analyze your personal water test report. 25,000 ppb mercury = Concentration of mercury in the Hepatitis B vaccine, administered at birth in the U.S., from 1990-2001. Exposure to mercury can cause health effects. Mercury is a potent neurotoxin that accumulates in fish to levels of concern for human health and the health of fish-eating wildlife. 200 ppb mercury = level in liquid the EPA classifies as hazardous waste. It exists in three forms that have different properties, usage, and toxicity. Mercury is a naturally occurring element found in rocks, soil, water, air and living things. The three forms are called elemental (or metallic) mercury, inorganic mercury compounds, and organic mercury compounds. Drinking Water Requirements for Lead EPA's Drinking Water Regulations for Lead. Emissions of both elemental or inorganic mercury can occur from coal-fired power plants, burning of municipal and medical waste, and from factories that use mercury. Many flu vaccines have no mercury at all. This law requires EPA to determine the level of contaminants in drinking water at which no adverse health effects are likely to occur with an adequate margin of safety. Mercury contamination of fish is the primary reason for issuing fish consumption advisories, which exist in every State in the Nation. Does this public drinking water supply violate the standards for mercury? Some people who drink water containing inorganic mercury substantially in excess of the maximum contaminant level (MCL) maximum contaminant levelThe highest level of a contaminant that EPA allows in drinking water. Mercury (Hg) 7439-97-6 Molybdenum (Mo) 7439-98-7 Nickel (Ni) 7440-02-0 ... for "direct analysis" of drinking water (turbidity <1 NTU), the combined ... the sample is made up to volume, is mixed and centrifuged or allowed to settle overnight prior to analysis. 20 ppb mercury = Neurite membrane structure destroyed (Leong et al., Neuroreport 2001; 12: 733-37). Inorganic mercury salts can be transported in water and occur in soil. 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