APES unit 5B 5
Bottled water is the US costs 240 to 100,000 times more than tap water, yet 40% of bottled water is contaminated by fungi and bacteria
40%
According to the EPA, one in _____ Americans drinks water supplied by a water treatment plant that has violated one or more safety standards during part of the year.
5
The Colorado river provides all of the except
A sustainable water supply for an ever-increasing population
In a septic tank system, which of the following is NOT true
After leaving the absorption field, wastewater is cleaned and can be used again for human consumption.
Primary sewage treatment is used to remove which of the following from the water?
Both biodegradable and non-biodegradable solids
The process of human activities near urban or agricultural areas that inputs excess plant nutrients into bodies of water is known as
Cultural Eutrophication
Withdrawing too much water from an aquifer can cause all of the following EXCEPT
Droughts
The natural nutrient enrichment of a shallow lake, estuary or slow moving stream is called
Eutrophication
Which of the following will be the greatest impact of development on the local water supply
There will be less recharge of groundwater
Which of the following is an example of gray water
Water that has been used for bathing and washing clothes
Which of the following would be used in a secondary sewage treatment process
aerobic bacteria used to biodegrade organic wastes
A good indicator of water quality is the number of ______ present
coliform bacteria
All of the following are available to improve water efficiency EXCEPT
condensing water vapor from indoor air
Which of the following is NOT a preventative method of reducing cultural eutrophication?
harvesting shoreline weeds
Over half of the total mass of pollutants entering streams and lakes comes from
nonpoint pollution from agriculture
Which of the following uses the smallest amount of water
public drinking water
Most water-transfer projects illustrate
the principle that you can't do just one thing