Perchlorate interferes with the normal function of the thyroid gland and thus has the potential to affect growth Rocket propellants, and development, causing brain damage and other 0.002 mg/l 1000 2 ppb N/A Perchlorate fireworks, munitions, flares, adverse effects, particularly in fetuses and infants. blasting agents Pregnant women, the fetus, infants, children up to the age of 12, and people with a hypothyroid condition are particularly susceptible to perchlorate toxicity. Selenium is an essential nutrient. However, some people Discharge from metal who drink water containing selenium in excess of the refineries; Erosion of natural 0.05 mg/l 1000 50 ppb 50 ppb Selenium MCL over many years could experience hair or fingernail deposits; Discharge from losses, numbness in fingers or toes, or problems with mines their circulation. Leaching from Some people who water containing thallium in 0.002 mg/l 1000 2 ppb 0.5 ppb sites; Discharge excess of the MCL over many years could experience Thallium from electronics, glass, and hair loss, changes in their blood, or problems with their drug factories kidneys, intestines, or liver. Including Pesticides and Herbicides Synthetic Organic Contaminants Some people who drink water containing the weed killer Runoff from herbicide used 2,4-D well in excess of the MCL over many years could 0.07 mg/l 1000 70 ppb 70 ppb 2,4-D (ppb) on row experience problems with their kidneys, liver, or adrenal glands. Some people who drink water containing silvex in excess 0.05 mg/l 1000 50 ppb 50 ppb 2,4,5-TP [Silvex] Residue of banned herbicide of the MCL over many years could experience liver problems.
Perchlorate 0.002 mg/l 1000 2 ppb N/A Rocket propellants, fireworks, munitions, flares, blasting agents Perchlorate interferes with the normal function of the thyroid gland and thus has the potential to affect growth and development, causing brain damage and other adverse effects, particularly in fetuses and infants. Pregnant women, the fetus, infants, children up to the age of 12, and people with a hypothyroid condition are particularly susceptible to perchlorate toxicity. Selenium 0.05 mg/l 1000 50 ppb 50 ppb Discharge from metal refineries; Erosion of natural deposits; Discharge from mines Selenium is an essential nutrient. However, some people who drink water containing selenium in excess of the MCL over many years could experience hair or fingernail losses, numbness in fingers or toes, or problems with their circulation. Thallium 0.002 mg/l 1000 2 ppb 0.5 ppb Leaching from sites; Discharge from electronics, glass, and drug factories Some people who water containing thallium in excess of the MCL over many years could experience hair loss, changes in their blood, or problems with their kidneys, intestines, or liver. Synthetic Organic Contaminants Including Pesticides and Herbicides 2,4-D (ppb) 0.07 mg/l 1000 70 ppb 70 ppb Runoff from herbicide used on row Some people who drink water containing the weed killer 2,4-D well in excess of the MCL over many years could experience problems with their kidneys, liver, or adrenal glands. 2,4,5-TP [Silvex] 0.05 mg/l 1000 50 ppb 50 ppb Residue of banned herbicide Some people who drink water containing silvex in excess of the MCL over many years could experience liver problems.
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