Water Pollution Test Review

Available Water:

-Sea Water: 97.5%

-Freshwater: 2.5%

Ice caps/glaciers: 79%

Groundwater: 20%

Surface water (lakes/streams): 1%

Main Uses of Water:

-domestic (drinking, cooking, toilets)

-industrial (cooling systems, cars)

-agricultural (irrigation-animals, crops)

Water Pollution:

Point Source Pollution: specific locations of pollution

-sewage or drain pipes

-leaky gas tanks

-industrial sites

Non-point Source Pollution: pollution from widespread (unknown) areas

-agricultural, residential, or industrial runoff

-atmospheric deposition

Categories of Water Pollution:

-Sewage- ex) wastewater from toilets, household drains

-Pathogens- ex) human and animal wastes (typhoid, cholera)

-Plant nutrients- ex) phosphates, nitrates

-Organic compounds- ex) oil, gasoline, plastics, detergents

-Toxic inorganic compounds- ex) lead, acids

-Sediment- ex) soil, silt