Water PollutionWater Pollution

Chapter 11 section 3Chapter 11 section 3

Water PollutionWater Pollution

The introduction of The introduction of undesirable items into undesirable items into water.water.

ChemicalChemical Physical, such as Physical, such as

Thermal.Thermal. BiologicalBiological Two Types: point and Two Types: point and

non-source pointnon-source point

Point Source PollutionPoint Source Pollution

Pollution is Pollution is discharged from a discharged from a single point.single point.

Examples:Examples: Leaking fuel or septic Leaking fuel or septic

tankstanks Unlined landfillsUnlined landfills Discharge from Discharge from

factoriesfactories

Nonpoint-source pollutionNonpoint-source pollution

Runoff!!Runoff!! Nonsource point Nonsource point

pollution can enter the pollution can enter the water system from water system from many different ways many different ways and is more difficult to and is more difficult to control.control.

96% of water pollution 96% of water pollution is nonsource point.is nonsource point.

Types of PollutionTypes of Pollution

PathogensPathogens Organic matterOrganic matter Organic chemicalsOrganic chemicals Inorganic chemicalsInorganic chemicals Heavy metalsHeavy metals Physical agentsPhysical agents

WastewaterWastewater

Wastewater is water Wastewater is water that contains wastes that contains wastes from home of from home of industry.industry.

This water is treated This water is treated to make it clean to make it clean enough to return to a enough to return to a river or lake.river or lake.

Artificial EutrophicationArtificial Eutrophication

Eutrophication: a Eutrophication: a natural process when natural process when organic matter fills in a organic matter fills in a waterway over time to waterway over time to form a marsh or form a marsh or swamp.swamp.

Artificial Eutrophication Artificial Eutrophication occurs when fertilizer occurs when fertilizer runoff causes an algae runoff causes an algae bloom. bloom.

Artificial EutrophicationArtificial Eutrophication

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

Thermal PollutionThermal Pollution

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

Ground Water PollutionGround Water Pollution

Pollutants are filtered Pollutants are filtered as they travel through as they travel through the permeable soil,the permeable soil,

BUT: not all pollutants BUT: not all pollutants are removed. The are removed. The rest find their way into rest find their way into the aquifers.the aquifers.

How to clean it up???How to clean it up???

Ocean PollutionOcean Pollution

Pollution of the ocean is a major concern. Pollution of the ocean is a major concern. All water flows into the ocean, so runoff is All water flows into the ocean, so runoff is a major problem.a major problem.

Each year about 37 million gallons of oil Each year about 37 million gallons of oil are spilled into the ocean by tanker are spilled into the ocean by tanker accidents. accidents.

Runoff is responsible for 200-300 million Runoff is responsible for 200-300 million gallons a year.gallons a year.

Ocean PollutionOcean Pollution

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

Why is that not a Why is that not a complete solution?complete solution?

Water Pollution and EcosystemsWater Pollution and Ecosystems

Biomagnification: the Biomagnification: the concentration of concentration of chemicals such as chemicals such as pesticides in the pesticides in the tissues of animals as tissues of animals as one moves up the one moves up the trophic levels.trophic levels.

Cleaning up Water PollutionCleaning up Water Pollution

1969 the Cuyahoga 1969 the Cuyahoga River caught on fire!River caught on fire!

The Clean Water act The Clean Water act of 1972 was passedof 1972 was passed

-goal was to -goal was to make all water clean make all water clean enough for fishing enough for fishing and swimming by and swimming by 1983.. 1983..

http://www.epa.gov/safewater/http://www.epa.gov/safewater/contaminants/index.htmlcontaminants/index.html