1. Honors Earth/Environmental Science
Water Pollution
Honors Earth/Environmental Science

2. Sources of Pollution #1 source worldwide is raw sewage
Mostly in underdeveloped countries
In developed countries
Municipal pollution
Industrial pollution
Agricultural pollution

3. Municipal Pollution Main sources
Untreated sewage (includes septic tanks)
Storm drains
Yard products (fertilizer, herbicides)

4. Industrial Pollution From factories, hospitals, etc.
Heavy metals (mercury, lead, etc.)
Chemicals from fossil fuels (sulfur, etc.)
Heated water from power stations

5. Agricultural Pollution
From raising crops and animals
Fertilizer and pesticides
Animal wastes

6. Effects of Pollution
Extra nutrients cause excess algae and plant growth
This causes a decrease in the amount of oxygen in water
Decreased oxygen causes native animal life to die
Result is called a dead zone

9. Thermal Pollution
Water added to rivers and lakes that has changed in temperature
Hot water coming from power plants cooling down equipment
Cold water comes from reservoirs behind dams
Both can harm wildlife that need certain temperatures of water

10. Water Treatment Two processes in producing drinkable water:
Sewage treatment
Removing contaminants, solids, wastes
Water purification
Removing bacteria, chemicals, viruses, fungi, etc.

11. Individuals and Water Quality
Recycle and dispose of chemicals properly
Use limited lawn and garden chemicals
Do not let vehicles leak fluids on the ground
Keep waste out of storm drains

12. Ways To Conserve Water Use better irrigation methods for gardens
Install low-flow showerheads and toilets
Turn off water when not using and take shorter showers
Always keep water use in mind