1. Water pollution

2. Where does water pollution come from?
Sources of Point Pollution
23 million septic-tank systems
190,000 storage lagoons for polluted waste
9,000 municipal landfills
About 2 million underground storage tanks containing pollutants such as gasoline
Thousands of public and industrial wastewater treatment plants
Sources of Nonpoint Pollution
Highway construction and maintenance eroding soil and toxic chemicals
Storm-water runoff from city or suburban streets: oil, gasoline. Dog feces, litter
Pesticides from 112 million hectares of cropland treated with these substances each year.
50 million tons of fertilizer applied to lawns and crops
10 million tons of dry salt applied to highways for snow and ice

3. Water Pollution

5. Water pollution

6. Canton Paper Mill
Canton Paper Mill

8. Water Pollution

9. Fresh water and Salt water at the coast

10. Where does pollution come from in our oceans?

11. Marine water pollution

12. See active board notes biomagnification