Water Pollution

The pollution of water bodies like lakes, rivers, ocean or groundwater is known as

water pollution

. All types of water pollutions affect the lives of living organisms in the water. Sometimes pollution also kills a whole biological community in the water. It occurs due to the pollutants that are directly released in water bodies. They are disposed without proper treatment for removing harmful chemicals.

Categories of Water Pollution:

Point Source Pollution

Point source pollution points to the contaminants which enter a water source through discrete nooks like pipe or a ditch. These contaminants can come from sources like sewage treatment plants, a factory or a storm drain.

Non-Point Source Pollution:

This refers to contamination that does not come from one discrete source. Non-point Source (NPS) pollution is mostly due to the collection of contaminants in small amounts. These small amounts pile up into huge volumes. For example: the letting out of nitrogen compounds after the fertilizing of an agricultural land.
Contaminated storm water that are wash offs of parking lots, highways, etc. are called urban run-offs. Sometimes, they also come under the category of NPS pollution.

Groundwater Pollution:

The relation between groundwater and surface water is complex. Ground water pollution is sometimes also called

groundwater contamination

. Groundwater is more prone to pollution than surface water. When a chemical substance is spilled on soil, it has specific point source or non-point source. But the chemical directly goes to the groundwater and cause pollution. Groundwater pollution also depends on the soil characteristics.

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