Water Pollution

Water PollutionWater Pollution is

the addition of any substance that has a negative effect on water or the living things that depend on water.

Point Source Pollution Sources of pollution are

classified, in part, by how they enter a body of water.

Point source pollution is a specific source of pollution that can be identified.

Example: A pipe gushing colored water into a river       

Non-Point Source Pollution

A widely spread source of pollution that can’t be tied to a specific point of origin is called nonpoint source pollution.

Example: Runoff from a farm field, a street, or a construction site

Major Sources Of Water Pollution

Three major sources of water pollution are:

1. Human Wastes2. Industrial Wastes

3. Chemical Runoff

Human Waste Sewage in cities

During heavy rains or floods, sanitary sewers sometimes overflow and can pollute the surface water.

If this happens, people are often told to boil water for drinking and cooking after a flood.

Sewage in Rural AreasWastes from cattle, pigs, and chickens can

also be a problem in rural areas. Animal wastes can run off from pastures

and barnyards and pass disease-causing bacteria and other kinds of pollution into bodies of water.

Industrial WastesChemicals, smoke , and heated water are three types of pollutants produced by factories, mines, and other industries.

Chemical RunoffMany factory processes

involve toxic chemicals and strong acids.

Other toxic wastes are produced as a result of manufacturing and mining processes.

Although laws control many point sources of chemical pollution, some factories still release toxic chemicals directly into nearby rivers and lakes.

Hazards To Humans• Humans are affected by

water pollution . • People can get diseases such

as hepatitis by eating seafood that has been poisoned. • In many poor nations, there is

always outbreak of cholera and diseases as a result of poor drinking water treatment from contaminated waters.

If it continues then no more drinking water will be on earth in next 40 or 50 years

“Every year, more people die from the consequences of unsafe water

than from all forms of violence, including war”

Water Pollution SolutionsSolving pollution problems involves cleaning

up existing problems as well as preventing new ones. Cleanup

oMany pollutants are removed from fresh water through natural cleanup processes.

oLiving things in lakes, streams, and wetlands help reduce pollution by filtering out and breaking down waste materials.

GROUP 03

1.Ghulam Abbas2.Zain Javed3.Maria Zahoor4.Abdullah Yousaf