Watershed
What are watersheds?
An area that water drains into, such as a lake or river.
What are the 2 types of wastewater?
Blackwater and Greywater
What are the 2 main types of water pollution?
Chemical and biological
Name One threats to watersheds.
Pollution, dams, and removing too much water for bottled water or factories.
How do towns and cities treat their wastewater?
The water is sent to underground pipes which then is sent to a treatment plant to be cleaned.
Where does chemical pollution come from?
Fertilizers, pesticides, road salt, and acid rain.
What are the largest watersheds in North America?
The Great Lakes Basin
How does the countryside clean its wastewater?
Homes have septic systems.
What is biological pollution caused by?
Bacteria and parasites can come from farm manure or animal feces.
What happens if we don't protect watersheds?
We lose the clean water that we need for survival.
What are the impacts to wastewater from more people living in a city?
Water can overflow out of the treatment plant to flow into rivers and lakes.
How does chemical pollution usually get into rivers and lakes?
Contaminants flow into rivers and lakes when it rains.
Why is the Great Lakes Basin an important watershed in North America?
Because it provides water to millions of people.
What are some examples of the 2 types of wastewater mentioned?
Greywater is from sinks, showers and laundry & Blackwater is from toilets, which contains feces and urine.
In Walkerton, Ontario, how does the polluted water affect the people?
The water made the people extremely sick and caused deaths.