1. Water Pollution Chapter 11 section 3

2. Water Pollution The introduction of undesirable items into water. The introduction of undesirable items into water. Chemical Chemical Physical, such as Thermal. Physical, such as Thermal. Biological Biological Two Types: point and non-source point Two Types: point and non-source point

3. Point Source Pollution Pollution is discharged from a single point. Pollution is discharged from a single point. Examples: Examples: Leaking fuel or septic tanks Leaking fuel or septic tanks Unlined landfills Unlined landfills Discharge from factories Discharge from factories

4. Nonpoint-source pollution Runoff!! Runoff!! Non-point source pollution can enter the water system in many different ways and is more difficult to control. Non-point source pollution can enter the water system in many different ways and is more difficult to control. 96% of water pollution is non point source. 96% of water pollution is non point source.

5. Types of Pollution Pathogens Pathogens Organic matter Organic matter Organic chemicals Organic chemicals Inorganic chemicals Inorganic chemicals Heavy metals Heavy metals Physical agents Physical agents

6. Wastewater Wastewater is water that contains wastes from home or industry. Wastewater is water that contains wastes from home or industry. This water is treated to make it clean enough to return to a river or lake. This water is treated to make it clean enough to return to a river or lake.

8. Artificial Eutrophication Eutrophication: a natural process when organic matter fills in a waterway over time to form a marsh or swamp. Eutrophication: a natural process when organic matter fills in a waterway over time to form a marsh or swamp. Artificial Eutrophication occurs when fertilizer runoff causes an algae bloom. Artificial Eutrophication occurs when fertilizer runoff causes an algae bloom.

9. Artificial Eutrophication The algae dies and the decay of the dead algae uses up the dissolved oxygen, which then suffocates the fish and other life in the water. The algae dies and the decay of the dead algae uses up the dissolved oxygen, which then suffocates the fish and other life in the water.

10. Thermal Pollution Thermal Pollution occurs when Power plants or other industries dump warm water used to cool equipment into the river. Warm water does not hold dissolved oxygen. Thermal Pollution occurs when Power plants or other industries dump warm water used to cool equipment into the river. Warm water does not hold dissolved oxygen.

11. Ground Water Pollution Pollutants are filtered as they travel through the permeable soil, Pollutants are filtered as they travel through the permeable soil, BUT: not all pollutants are removed. The rest find their way into the aquifers. BUT: not all pollutants are removed. The rest find their way into the aquifers.

12. Ocean Pollution Pollution of the ocean is a major concern. All water flows into the ocean, so runoff is a major problem. Pollution of the ocean is a major concern. All water flows into the ocean, so runoff is a major problem. Each year about 37 million gallons of oil are spilled into the ocean by tanker accidents. Each year about 37 million gallons of oil are spilled into the ocean by tanker accidents. Runoff is responsible for 200-300 million gallons a year. Runoff is responsible for 200-300 million gallons a year.

13. Ocean Pollution The Oil Pollution act of 1990 requires that all oil tankers have double hulled ships by 2015. The Oil Pollution act of 1990 requires that all oil tankers have double hulled ships by 2015.

14. Water Pollution and Ecosystems Biomagnification: Biomagnification: The concentration of chemicals such as pesticides in the tissues of animals as one moves up the trophic levels.

15. Cleaning up Water Pollution 1969 the Cuyahoga River caught on fire! 1969 the Cuyahoga River caught on fire! The Clean Water act of 1972 was passed The Clean Water act of 1972 was passed