Water Pollution. Types of Pollutants. Microorganisms Cryptosporidium Giardia Fecal coliform bacteria. Types of Pollutants. Disinfectants Chlorine Bromate Chlorite Inorganic chemicals Arsenic, cadmium, lead mercury. Types of Pollutants. Organic chemicals Benzene Dioxin
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Human and animal waste (microorganisms)
Naturally occurring in geologic deposits (As, U)
Human activities– industry, mining, agriculture deliver many inorganic and most organic pollution
Sediments from erosion and activities such as excavation & construction
Dissolved chemicals can be toxic or carcinogenic
Non-aqueous phased liquids (NAPLs) form a separate phase that does not mix with water
Soluble pollutants enter ground water , flow as plumes
Easier to control if it comes from a point source
Coastal areas and estuaries are impacted by pollution and sedimentation
2000 National Research Council cited nutrient pollution as one of the most important ocean pollution problems
Septic systems- a large container that receives wastewater from the house.
Sewage Treatment Plants- centralized plants in areas with large populations that receive wastewater via a network of underground pipes.
More than 2 million people die each year (cholera, typhoid, dysentery)
1993 – cryptosporidium in Milwaukee killed 110, sickened 400,000
After the outbreak, federal regulators increased testing requirements for turbidity