Differentiate between point and non-point sources of water pollution.

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Solution

Point Source: Sources of pollution which are close to the water sources are called point sources.
Non-point sources: Sources of pollution which are scattered and do not have any specific location are called non-point sources.
Point Sources
Non-point Sources
Pollutants are discharged directly into water bodies.
Pollutants are discharged away from water bodies and at various places.
2. Easy to treat the pollutants in the water treatment plant before they enter the water bodies 2. Difficult to treat the pollutants before they enter water bodies.
3. More harmful 3. Less harmful in comparison to point source water pollution.
4. For Example- Sewage outlets in the municipal area, power plants, oil wells, and underground coal mines close to water bodies. 4. For Example- Garden, roads, construction sites, runoff water from the field, etc.

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Factories, power plants, oil wells, etc. are called non-point sources of water pollution

Read the paragraph and answer the questions following it.

Water is essential for life. Without water, there would be no life. We usually take water as granted for its purity, but we must ensure the quality of water. Pollution of water originates from human activities. Through different paths, pollution reaches to groundwater. Easily identified source or place of pollution is called a point source, e.g.– municipal and industrial discharge pipes, where pollutants enter the water source. Non–point sources of pollution are those where a source of pollution can not be easily identified, e.g.– agricultural runoff, acid rain, etc.

1) How do you classify the various sources of water pollution?

2) What are the point sources of water pollution?

3) Name any two non-point sources of water pollution?

Q. Which one of these are non-point sources of pollution?

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Point Sources	Non-point Sources
Pollutants are discharged directly into water bodies.	Pollutants are discharged away from water bodies and at various places.
2. Easy to treat the pollutants in the water treatment plant before they enter the water bodies	2. Difficult to treat the pollutants before they enter water bodies.
3. More harmful	3. Less harmful in comparison to point source water pollution.
4. For Example- Sewage outlets in the municipal area, power plants, oil wells, and underground coal mines close to water bodies.	4. For Example- Garden, roads, construction sites, runoff water from the field, etc.