Water pollution is the contamination of water, like in lakes, rivers, oceans, and groundwater caused by human activities.

Sewage: used for wastewater that often contains urine and laundry waste.

Industrial: industrial facilities use freshwater to carry away waste from the plant and into rivers, lakes and oceans.

Oil: Oil spills make up about 12% of the oil that enters the ocean. The rest come from shipping travel, drains and dumping.

Marine Dumping: People throw waste into the ocean, such as cardboard, newspaper, foam, and others.

Radioactive waste: produced from industrial, medical and scientific processes that use radioactive material.

http://www.water-pollution.org.uk/causes.html

Water pollution affects our oceans, lakes, rivers, and drinking water, making it a widespread and global concern. Numerous diseases, health problems, and even fatalities have been associated with water pollution.

http://scipeeps.com/effects-of-water-pollution/

In the antiquated water In the antiquated water delivery systems in these cities delivery systems in these cities are comprised of nearly 1 are comprised of nearly 1 million miles of piping, mostly million miles of piping, mostly made of iron. As the made of iron. As the ironiron pipes pipes corrode, clean water corrode, clean water flowingflowing through them becomes through them becomes contaminated with rust. contaminated with rust. OOver ver time the pipes also rupture, time the pipes also rupture, causing not only water loss, causing not only water loss, but the introduction of but the introduction of pollutants and diseases from pollutants and diseases from the ground. Investigations the ground. Investigations conducted in the last five years conducted in the last five years suggest that a substantial suggest that a substantial proportion of proportion of waterborne disease outbreakswaterborne disease outbreaks..

http://http://www.naturalnews.com/www.naturalnews.com/021504_water_tap_wate021504_water_tap_water_water_pollution.htmlr_water_pollution.html

Don't throw paints, oils or other Don't throw paints, oils or other forms of litter down the drain, forms of litter down the drain, because it can contaminate the because it can contaminate the sewage water.sewage water.

Use environmentally household Use environmentally household products, such as washing products, such as washing powder, household cleaning powder, household cleaning agents and toiletries.agents and toiletries.

Don't throw litter into rivers, Don't throw litter into rivers, lakes or oceans. Help clean up lakes or oceans. Help clean up any litter you see on beaches or any litter you see on beaches or in rivers and lakes, make sure it in rivers and lakes, make sure it is safe to collect the litter and is safe to collect the litter and put it in a nearby dustbin.put it in a nearby dustbin.

http://www.water-pollution.org.uk/preventingyou.html