CONTAMINANT	POTENTIAL HEALTH HAZARD	SOURCE
Cryptosporidium, Viruses (enteric), Giardia Lamblia	Gastrointestinal illness-diarrhea, vomiting, cramps	Human and Animal Faeces
Mercury (inorganic)	Kidney Damage	Erosion of natural deposits; discharge from refineries and factories; landfills runoff
Thallium	Hair or fingernail loss; numbness in fingers or toes; circulatory problems	Leaching from ore-processing sites; discharge from electronics, glass and drug factories
Lead	Delays physical, mental development & causes deficiency in attention span & learning abilities	Corrosion of household plumbing systems; erosion of natural deposits
Nitrate	Fatal for infants below 6 months. Symptoms include shortness of breath and blue-baby syndrome	Runoff from fertilizer use; leaching from septic tanks, sewage; erosion of natural deposits
Bromate	Increases Risk of Cancer	Bi-product of drinking water disinfectants
Chlorite / Chlorine dioxide	Anemia in infants & young children, affects nervous system
Halo acetic Acids	Increases Risk of Cancer
Chloramines / Chlorine	Eye, nose irritation, stomach discomfort, anemia	Water additive used to control microbes
Insecticide and Pesticide	Increases Risk of Cancer