How can we control water pollution ?

Answer 1

Raw sewage includes waste from sinks, toilets, and industrial processes. Treatment of the sewage is required before it can be safely buried, used, or released back into local water systems. In a treatment plant, the waste is passed through a series of screens, chambers, and chemical processes to reduce its bulk and toxicity. The three general phases of treatment are primary, secondary, and tertiary. During primary treatment, a large percentage of the suspended solids and inorganic material is removed from the sewage. The focus of secondary treatment is reducing organic material by accelerating natural biological processes. Tertiary treatment is necessary when the water will be reused; 99 percent of solids are removed and various chemical processes are used to ensure the water is as free from impurity as possible.:

Answer 2

IT IS IN YOUR HANDS.
LIFE is not possible WITHOUT WATER.
As Generally;
1.Public authorities must control to trade effluent.
Where is go trade effluent ? I mean , must be under control.

As Personality;
1.Mustn't THROW any waste(bottle,plastic,stump of a cigarette and like this.) in the sea and water resources.
Namely,must have a care cleanliness regulations everywhere.

2.Mustn't use deodorant because of atmosphere balance.
You know like chemical weapon, chemical waste....etc all of them interfuse to atmosphere and then rain very in the dangerous shape LIKE ACID RAIN.

3.We have planting trees.So atmosphere can be more clear than previous.(increase clean water level because of oxygen level. )

4.Cars
Use a commercial car wash which recycles water and directs wastewater to the sewer.

5.Make sure swimming pools are backwashed into the sewer, not the stormwater drain.

IT IS YOUR HANDS.
If you see .There is useful info in below.

Best days.

Sem.

Answer 3

by stopping other pollution and water used as a precious thing

Answer 4

Bb manging a good source of sewage disposal system, and checkling the industrail activity arround,and stop disposal nof waste in water supply or source.

Answer 5

u can only sit ans ask question on yahoo but cant do anything about it
if u wana to stop it just stop using the water it will help us all

Answer 6

nothing is impossible. if people decide not to pollute it through their action.........we can save our rivers.there is no other option

Answer 7

shut down all technology as we know it

Answer 8

Sources of water pollution
Some of the principal sources of water pollution are:

industrial discharge of chemical wastes and byproducts
discharge of poorly-treated or untreated sewage
surface runoff containing pesticides or fertilizers
slash and burn farming practice, which is often an element within shifting cultivation agricultural systems
surface runoff containing spilled petroleum products
surface runoff from construction sites, farms, or paved and other impervious surfaces e.g. silt
discharge of contaminated and/or heated water used for industrial processes
acid rain caused by industrial discharge of sulfur dioxide (by burning high-sulfur fossil fuels)
excess nutrients added by runoff containing detergents or fertilizers
underground storage tank leakage, leading to soil contamination, thence aquifer contamination

Litter in U.K.'s water
Raw sewage and industrial waste flows into the U.S. from Mexico as the New River passes from Mexicali, Baja California to Calexico, California
[edit] Contaminants
Contaminants may include organic and inorganic substances.

Some organic water pollutants are:

insecticides and herbicides, a huge range of organohalide and other chemicals
bacteria, often is from sewage or livestock operations;
food processing waste, including pathogens
tree and brush debris from logging operations
VOCs (Volatile Organic Compounds, industrial solvents) from improper storage
Some inorganic water pollutants include:

heavy metals including acid mine drainage
acidity caused by industrial discharges (especially sulfur dioxide from power plants)
chemical waste as industrial by products
fertilizers, in runoff from agriculture including nitrates and phosphates
silt in surface runoff from construction sites, logging, slash and burn practices or land clearing sites

Water pollution
[edit] Transport and chemical reactions of water pollutants
Most water pollutants are eventually carried by the rivers into the oceans. In some areas of the world the influence can be traced hundred miles from the mouth by studies using hydrology transport models. Advanced computer models such as SWMM or the DSSAM Model have been used in many locations worldwide to examine the fate of pollutants in aquatic systems. Indicator filter feeding species such as copepods have also been used to study pollutant fates in the New York Bight, for example. The highest toxin loads are not directly at the mouth of the Hudson River, but 100 kilometers south, since several days are required for incorporation into planktonic tissue. The Hudson discharge flows south along the coast due to coriolis force. Further south then are areas of oxygen depletion, caused by chemicals using up oxygen and by algae blooms, caused by excess nutrients from algal cell death and decomposition. Fish and shellfish kills have been reported, because toxins climb the foodchain after small fish consume copepods, then large fish eat smaller fish, etc. Each step up the food chain concentrates certain toxins like heavy metals and DDT by approximately a factor of ten.

The big gyres in the oceans trap floating plastic debris. The North Pacific Gyre for example has collect the so-called Great Pacific Garbage Patch that is now about the size of Texas. Many of these long-lasting pieces wind up in the stomachs of marine birds and animals.

Many chemicals undergo reactive decay or change especially over long periods of time in groundwater reservoirs. A noteworthy class of such chemicals are the chlorinated hydrocarbons such as trichloroethylene (used in industrial metal degreasing) and tetrachloroethylene used in the dry cleaning industry. Both of these chemicals, which are carcinogens themselves, undergo partial decomposition reactions leading to new hazardous chemicals.

Groundwater pollution is much more difficult to abate than surface pollution because groundwater can move great distances through unseen aquifers. Non-porous aquifers such as clays partially purify water of bacteria by simple filtration (adsorption and absorption), dilution, and, in some cases, chemical reactions and biological activity: however, in some cases, the pollutants merely transform to soil contaminants. Groundwater that moves through cracks and caverns is not filtered and can be transported as easily as surface water. In fact this can be aggravated by the human tendency to use natural sinkholes as dumps in areas of Karst topography.

There are a variety of secondary effects stemming not from the original pollutant, but a derivative condition. Some of these secondary impacts are:

Silt bearing surface runoff from can inhibit the penetration of sunlight through the water column, hampering Photosynthesis in aquatic plants.
Thermal pollution can induce fish kills and invasion by new thermophyllic species

[edit] Regulatory framework
In the UK there are common law rights (civil rights) to protect the passage of water across land unfettered in either quality of quantity. Criminal laws dating back to the 16th century exercised some control over water pollution but it was not until the River (Prevention of pollution )Acts 1951 - 1961 were enacted that any systematic control over water pollutuion was established. These laws were strengthened and extended in the Control of Pollution Act 1984 which has since been updated and modified by a series of further acts. It is a criminal offence to either pollute and lake, river, groundwater or the sea or to discharge any liquid into such water bodies with proper authority. In England and Wales such permission can only be issued by the Environment Agency and in Scotland by SEPA.

In the USA, concern over water pollution resulted in the enactment of state anti-pollution laws in the latter half of the 19th century, and federal legislation enacted in 1899. The Refuse Act of the federal Rivers and Harbors Act of 1899 prohibits the disposal of any refuse matter from into either the nation's navigable rivers, lakes, streams, and other navigable bodies of water, or any tributary to such waters, unless one has first obtained a permit. The Water Pollution Control Act, passed in 1948, gave authority to the Surgeon General to reduce water pollution.

Growing public awareness and concern for controlling water pollution led to enactment of the Federal Water Pollution Control Act Amendments of 1972. As amended in 1977, this law became commonly known as the Clean Water Act. The Act established the basic mechanisms for regulating contaminant discharge. It established the authority for EPA to implement wastewater standards for industry. The Clean Water Act also continued requirements to set water quality standards for all contaminants in surface waters. Further amplification of the Act continued including the enactment of the Great Lakes Legacy Act of 2002 (Public Law 107-303, November 27, 2002).