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What is the primary difference between the treatment processes for drinking water compared to wastewater?
chemical runoff from lawns
Local and government organizations should monitor and assess lakes and streams.
As DO levels increase, mortality rates decrease
Once treated, wastewater is released into a waterway.
a cool environment in which aquatic animal populations are low, and plant growth is high
high numbers of bioindicators, low temperature, and high dissolved oxygen
by measuring its dissolved oxygen content.
The source cannot be identified or comes from many different unknown sites.
Which conditions indicate that a water system is healthy?
chemical runoff from lawns
Local and government organizations should monitor and assess lakes and streams.
As DO levels increase, mortality rates decrease
Once treated, wastewater is released into a waterway.
a cool environment in which aquatic animal populations are low, and plant growth is high
high numbers of bioindicators, low temperature, and high dissolved oxygen
by measuring its dissolved oxygen content.
The source cannot be identified or comes from many different unknown sites.
Dissolved oxygen levels in water sources are dependent on several factors, including temperature and concentration of plant and animal species. Which environment would most likely have the highest levels of dissolved oxygen?
chemical runoff from lawns
Local and government organizations should monitor and assess lakes and streams.
As DO levels increase, mortality rates decrease
Once treated, wastewater is released into a waterway.
a cool environment in which aquatic animal populations are low, and plant growth is high
high numbers of bioindicators, low temperature, and high dissolved oxygen
by measuring its dissolved oxygen content.
The source cannot be identified or comes from many different unknown sites.
Which example represents a non-point source of pollution?
chemical runoff from lawns
Local and government organizations should monitor and assess lakes and streams.
As DO levels increase, mortality rates decrease
Once treated, wastewater is released into a waterway.
a cool environment in which aquatic animal populations are low, and plant growth is high
high numbers of bioindicators, low temperature, and high dissolved oxygen
by measuring its dissolved oxygen content.
The source cannot be identified or comes from many different unknown sites.
Which of the following best represents the relationship between dissolved oxygen levels and the mortality(death) rate of aquatic organisms?
chemical runoff from lawns
Local and government organizations should monitor and assess lakes and streams.
As DO levels increase, mortality rates decrease
Once treated, wastewater is released into a waterway.
a cool environment in which aquatic animal populations are low, and plant growth is high
high numbers of bioindicators, low temperature, and high dissolved oxygen
by measuring its dissolved oxygen content.
The source cannot be identified or comes from many different unknown sites.
What is the best method for the preservation of water quality?
chemical runoff from lawns
Local and government organizations should monitor and assess lakes and streams.
As DO levels increase, mortality rates decrease
Once treated, wastewater is released into a waterway.
a cool environment in which aquatic animal populations are low, and plant growth is high
high numbers of bioindicators, low temperature, and high dissolved oxygen
by measuring its dissolved oxygen content.
The source cannot be identified or comes from many different unknown sites.
If all pollution must be caused by a source, how is it possible to have non-point source pollution?
chemical runoff from lawns
Local and government organizations should monitor and assess lakes and streams.
As DO levels increase, mortality rates decrease
Once treated, wastewater is released into a waterway.
a cool environment in which aquatic animal populations are low, and plant growth is high
high numbers of bioindicators, low temperature, and high dissolved oxygen
by measuring its dissolved oxygen content.
The source cannot be identified or comes from many different unknown sites.
What is one way scientists analyze the health of a river?
chemical runoff from lawns
Local and government organizations should monitor and assess lakes and streams.
As DO levels increase, mortality rates decrease
Once treated, wastewater is released into a waterway.
a cool environment in which aquatic animal populations are low, and plant growth is high
high numbers of bioindicators, low temperature, and high dissolved oxygen
by measuring its dissolved oxygen content.
The source cannot be identified or comes from many different unknown sites.
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