Why is surface water usually dirtier than ground water?

Air Sungai Asahan
Illustration: Rivers are surface water that flows directly over the earth's surface

Why is surface water usually dirtier than ground water? Surface water is usually dirtier than ground water because surface water is not filtered. Surface water flows directly over the earth’s surface, making it easily exposed to various types of pollutants, such as:

  • Dust and dirt
  • Rubbish
  • Remains of living creatures
  • Industrial waste
  • Agricultural waste

These pollutants can make surface water cloudy, smelly and unfit for consumption.

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Murky River Water
Illustration: River water is murky due to flooding. Image Credit: BanjarmasinPost.co.id

Meanwhile, ground water comes from surface water that seeps into the ground. As long as it seeps into the ground, the water will be filtered by the soil and rocks. Soil and rocks will filter various types of pollutants, so that groundwater becomes cleaner.

The following is a more detailed explanation of why surface water is usually dirtier than ground water:

Surface water is not filtered

Surface water flows directly over the earth’s surface, so it does not undergo filtering. Surface water will be exposed to various types of pollutants on the earth’s surface, such as dust, dirt, rubbish, remains of living creatures, industrial waste and agricultural waste.

Ground water is filtered by soil and rocks

Ground water comes from surface water that seeps into the ground. As long as it seeps into the ground, the water will be filtered by the soil and rocks. Soil and rocks will filter various types of pollutants, so that groundwater becomes cleaner.

Groundwater is better protected from pollution

Groundwater is below the earth’s surface, so it is better protected from pollution. Pollutants from the earth’s surface will find it difficult to reach groundwater.

Clean river
Illustration: Clean river water with minimal pollution. Get this image on: Pixabay. Copyright: marcoblindenbacher

Therefore, it is important to preserve surface water so that it is not polluted. This can be done by:

  1. Throw garbage in its place
  2. Overcoming industrial pollution
  3. Overcoming agricultural pollution
  4. Maintain the cleanliness of rivers and lakes

By preserving surface water, we can ensure the availability of clean water for future generations.

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