protecting water from pollution

reducing water pollution

Water pollution can be reduced in two ways: Keep the water from becoming polluted. Clean water that is already polluted.

clean water act

Keeping water from becoming polluted often requires laws to be sure that people and companies behave responsibly. In the United States, the Clean Water Act gives the Environmental Protection Agency (EPA) the authority to set standards for water quality for industry, agriculture, and domestic uses. The law gives the EPA the authority to reduce the discharge of pollution into waterways, finance wastewater treatment plants, and manage runoff. Since its passage in 1972, more wastewater treatment plants have been constructed and the release of industrial waste into the water supply is better controlled. Scientists control water pollution by sam- pling the water and studying the pollutants that are in the water. The United Nations and other international groups are working to improve global water quality standards by pro- viding the technology for treating water. These organizations also educate people in how to protect and improve the quality of the water they use (Figure 1.1). Click image to the left or use the URL below. URL:

textbook_image

water treatment

The goal of water treatment is to make water suitable for such uses as drinking, medicine, agriculture, and industrial processes. People living in developed countries suffer from few waterborne diseases and illness, because they have extensive water treatment systems to collect, treat, and redeliver clean water. Many underdeveloped nations have few or no water treatment facilities. Wastewater contains hundreds of contaminants, such as suspended solids, oxygen-demanding materials, dissolved inorganic compounds, and harmful bacteria. In a wastewater treatment plant, multiple processes must be used to produce usable water: Sewage treatment removes contaminants, such as solids and particles, from sewage. Water purification produces drinking water by removing bacteria, algae, viruses, fungi, unpleasant elements such as iron and sulfur, and man-made chemical pollutants. The treatment method used depends on the kind of wastewater being treated and the desired end result. Wastewater is treated using a series of steps, each of which produces water with fewer contaminants.

what can you do

What can individuals do to protect water quality? Find approved recycling or disposal facilities for motor oil and household chemicals. Use lawn, garden, and farm chemicals sparingly and wisely. Repair automobile or boat engine leaks immediately. Keep litter, pet waste, leaves, and grass clippings out of street gutters and storm drains. Click image to the left or use the URL below. URL:

instructional diagrams

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questions

epa stands for

a) environmental police agency

b) electric protection agency

-->  c) environmental protection agency

d) engenious policing agency

water quality standards are set by _, in accordance with the _ act.

-->  a) the epa; clean water

b) state governments; clean environment

c) the federal government; environmental protection

d) clean water association; water quality

the first step of treating wastewater is

a) de-oxidizing the wastes.

b) chemically purifying the water to be drinking water.

c) exposing the water to ultraviolet radiation for cleanliness.

-->  d) removing the large and small particles.

which of these is a wastewater contaminant?

a) suspended solids

b) dissolved inorganic compounds

c) bacteria

-->  d) all of the above

some water is purified enough for spreading on grass and some water is purified enough for drinking.

-->  a) true

b) false

water purification produces useable water by removing ___.

a) solids and particles

-->  b) bacteria

c) sediments

d) a & b

repairing automobile or boat engine leaks right away helps to protect water.

-->  a) true

b) false

when you take your dog to the park, you should leave its waste in place to act as fertilizer for nearby plants.

a) true

-->  b) false

to keep water from being polluted, individuals can

a) be sure storm drains are kept clean.

b) repair engine leaks immediately.

c) use chemicals in the house and yard as little as possible and always following directions.

-->  d) all of these.

keeping pollutants from getting into the water system is better than cleaning the water up after it is polluted.

-->  a) true

b) false

diagram questions

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