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Sources of Water Pollution

Sources of Water Pollution. Point Source vs. Non-point Source Pollution Point source – pollution discharged to the environment through pipes, sewers, ditches, etc. from sources such as factories or sewage treatment plants

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Sources of Water Pollution

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  1. Sources of Water Pollution • Point Source vs. Non-point Source Pollution • Point source – pollution discharged to the environment through pipes, sewers, ditches, etc. from sources such as factories or sewage treatment plants • Nonpoint source- pollutants discharged over large areas rather than a single point of entry (agricultural runoff, municipal wastes, construction sites, mining wastes, etc.)

  2. Sources of Water Pollution Non-point source Point Source

  3. Sources of Water Pollution • Point Source vs. Non-point source

  4. Sources of Water Pollution • Water Pollution from Agriculture • 72% of water pollution in rivers attributed to agriculture • Fertilizer runoff • Animal wastes and plant residue • Chemical pesticides • Soil erosion

  5. Sources of Water Pollution • Municipal Water Pollution • Point sources • Nonpoint sources

  6. Water Quality Today • Industrial Wastes in Water • Problems depend upon industry • Food processing  high BOD • Paper mills  toxic compounds & sludge • Many US industries now treating wastewater • (some can recover merchantable products)

  7. Water Quality Today • Groundwater Pollution

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