Asbestos is a naturally occurring fibrous mineral. Drinking water containing excessive levels of asbestos may increase risk for benign intestinal polyps.
Carbon tetrachloride is a chemical discharged from chemical plants and other industrial activities. Ingesting water with excessive levels of carbon tetrachloride can cause liver problems.
Ethylbenzene is a chemical discharged from petroleum plants. Excessive exposure to ethylbenzene can cause liver or kidney problems.
o-Dichlorobenzene is a chemical discharged from chemical factories. Exposure to excessive levels of this chemical in drinking water can cause liver, kidney or circulatory system problems.
Toluene is a chemical discharged from petroleum factories. Exposure to excessive levels of this chemical in drinking water can cause liver, kidney or nervous system problems.
VOCs, or Volatile Organic Chemicals, are a group of chemicals used as solvents in many industrial and household products. VOCs can enter the groundwater when they are improperly discarded. The health effects of drinking water containing excess VOC levels vary from headache, nausea and dizziness to liver damage and memory impairment.
Benzene is a chemical that leaches into the water supply from factory runoff, gas storage tanks and landfills. It's been linked to anemia, decrease in blood platelets and an increased risk of cancer.
Chlorobenzene is a chemical found in dyestuffs and insecticides. It's also used as a solvent. Drinking water contaminated with high levels of this chemical can cause liver, kidney and central nervous system damage.
MTBE is a chemical used to increase the oxygen content of fuel. MTBE can contaminate water supplies by storage tank leaks, pipelines, spills, marine engine emissions and to some extent from deposition.
Tetrachloroethylene is a chemical used primarily in dry cleaning. It gets into water supplies through emissions. Drinking water contaminated with high levels of this chemical can cause liver, kidney and central nervous system damage.
Trichloroethylene is a chemical used mainly as a solvent to remove grease from machine parts. Exposure to excessive levels of this chemical in drinking water can cause liver problems and increase the risk of cancer.