SHANNON WILLAERT IDT 510 ASSIGNMENT #4 Water to Drink NEXT
Slide 2
I will be able to Describe the factors that affect water
quality. Explain why water is often treated before people drink it.
List and describe the steps of the water treatment process. Explain
what happens to wastewater in most communities. NEXT
Slide 3
Water Quality The Environmental Protection Agency (EPA)
develops water-quality standards. The standards help to ensure that
water is safe to drink. NEXT
Slide 4
Selected Water-Quality Standards NEXT SubstanceLimit
Arsenic0.01 parts per million (ppm) Carbon tetrachloride0.005 ppm
Copper1.3 ppm Cyanide0.2 ppm Lead0.015 ppm Coliform countNo more
than 5% of samples taken in a month can be positive. pH6.5 8.5
Slide 5
Standards Explained pH measures how acidic or basic the water
is. Acidic water can cause problems by dissolving lead from pipes
it passes through. Hardness the combined level of calcium and
magnesium in water. Hard water does not easily form suds and can
lead to pipe-clogging deposits. Coliform count measures the amount
of E. coli bacteria. Their presence of E. coli in water shows that
it contains human or animal wastes. NEXT
Slide 6
Who determines quality standards? B. EPA (Environmental
Protection Agency) C. WHO (World Health Organization) D. UND
(University of North Dakota) A. CDC (Center for Disease
Control)
Slide 7
CORRECT! The EPA is responsible for deciding if water is safe
to drink as well as creating standards for ensuring good water
quality. NEXT
Slide 8
Sorry, it is not the CDC. The CDC is responsible for monitoring
the spread of disease around the world. Go back and try again.
Slide 9
Sorry, it is not the WHO. The World Health Organization is
responsible for monitoring disease outbreaks around the world. Go
back and try again.
Slide 10
Sorry, it is not UND. UND is responsible for educating
students. Go back and try again.
Slide 11
Why is water with a high coliform count not good to drink? A.
The water contains acid and may contain lead. C. The water contains
bacteria from human and animal wastes and may cause disease. B. The
water contains calcium and is hard. D. The water is OK to drink
with a high coliform count; water with a low coliform count is
unsafe.
Slide 12
Sorry, you are incorrect. Coliform count does not have to do
with acidity or lead. Acidity has to do with pH. Go back and try
again.
Slide 13
Sorry, you are incorrect. Hardness deals with the amount of
calcium and magnesium in water. Coliform count is not about
hardness of water. Go back and try again.
Slide 14
CORRECT! Coliform count is how much bacteria is in water. The
more bacteria, the more likely one is to get a disease. You want
the coliform count of the water you drink to be low so that you do
not get sick when you drink water. NEXT
Slide 15
Sorry, you are incorrect. Water with a low coliform count is
actually safe to drink. This means there is a very small number of
bacteria in the water. Go back and try again.
Slide 16
Treating Drinking Water Water will go through the following
steps in a water treatment plant. 1. First Filtration (large debris
is removed) 2. Coagulation (alum is added to form sticky flocs) 3.
Settling Basin (flocs sink into the settling basin) 4. Second
Filtration (small debris is removed) 5. Chlorination (chlorine
kills remaining organisms) 6. Aeration (air added to reduce odors)
7. Additional Treatments (water may be softened, fluoride added)
NEXT
Slide 17
NEXT
Slide 18
The Water Treatment Process
https://www.youtube.com/watch?v=tuYB8nMFxQA NEXT
Slide 19
Water Distribution Once water is treated, it is pumped to homes
through a network of pipes. Water towers may also be used to store
water until it is needed. NEXT
Slide 20
What does aeration do to the water during the treatment
process? A. Aeration removes large debris. B. Aeration kills tiny
organisms. C. Aeration makes the water smell better. D. Aeration
softens the water.
Slide 21
Sorry, you are incorrect. Filtration removes large debris from
water. Go back and try again.
Slide 22
Sorry, you are incorrect. Chlorination kills tiny organisms in
water. Go back and try again.
Slide 23
CORRECT! Aeration makes water smell and taste better. NEXT
Slide 24
Sorry, you are incorrect. Aeration does not soften water. Go
back and try again.
Slide 25
How does water get from a treatment facility to a home? A.
Water infiltrates the ground. B. Water is pumped to homes through
pipes. C. Water is stored in a water tower. D. Water is shipped
from the treatment center to your home.
Slide 26
Sorry, you are incorrect. Water that infiltrates the ground is
now called groundwater. Groundwater may get to your house through a
well, but this water has not been through a treatment facility. Go
back and try again.
Slide 27
CORRECT! Water that has been treated at a treatment facility is
pumped through underground pipes to get to your house. NEXT
Slide 28
Sorry, you are incorrect. If water is stored in a water tower,
than it cannot reach your house. The water must be pumped from the
water tower to get to your house. Go back and try again.
Slide 29
Sorry, you are incorrect. Water is not shipped to your house.
This would be take a lot of time, cost a lot of money, and be
harmful to the environment. Go back and try again.
Slide 30
Treating Wastewater You create wastewater when you take a
shower, flush the toilet, or wash a load of laundry. Wastewater and
the different kinds of waste in it are called sewage. Communities
deal with sewage through wastewater treatment plants or septic
systems. NEXT
Slide 31
Wastewater Treatment Plant Wastewater flows from homes to
sanitary sewers. These sewers carry water to wastewater treatment
plants. NEXT
Slide 32
Sewage Treatment Process
https://www.youtube.com/watch?v=gxgpK1EUZns NEXT
Slide 33
Septic System A septic system contains a septic tank which is
an underground tank containing bacteria that treat wastewater as it
passes through. Occasionally a septic tank must be pumped so that
materials that do not break down do not fill the tank. Water
filters from the tank into a septic field and over time, wastes
break down naturally in the soil. NEXT
Slide 34
Diagram of a Septic System NEXT
Slide 35
How a Septic System Works http://www.gbra.org/septic.swf
NEXT
Slide 36
What happens to water after it leaves a septic tank? A. Water
enters a septic field and wastes gradually break down there. B.
Water enters a second holding tank and remains there until it is
pumped out. C. Water stays in the septic tank. D. Water is pumped
into a network of pipes to be treated by the sewage treatment
plant.
Slide 37
CORRECT! Waste water that has entered the septic field is
underground and begins break down. NEXT
Slide 38
Sorry, you are incorrect. Water goes directly from a septic
tank to a septic field. Go back and try again.
Slide 39
Sorry, you are incorrect. Though some water will stay in a
septic tank, most water will go to the septic field after the
septic tank. Go back and try again.
Slide 40
Sorry, you are incorrect. Water from a septic tank does not get
pumped to a waste water treatment facility. Go back and try
again.
Slide 41
You should now be able to Describe the factors that affect
water quality. Explain why water is often treated before people
drink it. List and describe the steps of the water treatment
process. Explain what happens to wastewater in most communities.
NEXT
Slide 42
You should be able to define and use the following words: Water
quality EPA pH Hardness Coliform count Filtration Coagulation
Chlorination Aeration Water treatment Waste water Sewage Septic
tank Septic field Septic system NEXT