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Pollution and depth of waterFeatured science projectScience project video


The hypothesis that a water sample taken from deeper waters will contain less pollutants is proven to be incorrect.

It is important to maintain the quality of our fresh water resources and to ensure that they are free from polluting substances. This is to ensure there is enough clean water for our future generations. We also have the responsibility to ensure the survival of plants and animals which depend on these same water resources . It is our responsibility not only to make sure that waste water is treated before being released back into the environment, but also to mimize water pollution. Through a combination of better education, promoting the use of eco-friendly products and ensuring the proper disposal of household waste, we can do much to prevent the contamination of our precious sources life-sustaining water.

Also consider

What would happen if this science fair project were to be repeated with water samples taken from rivers or oceans?

The experiment might also repeated by taking water samples from greater depths of 5 meters, 10 meters, 15 meters and 20 meters. Would the water be necessarily more turbid at even greater depths? Or perhaps we should be looking at a bell-shaped curve, where up to a certain depth, the water begins to clear up and register lower turbidity readings?


Water pollution -

Common water measurements -

Earth’s water- rivers and sediment -

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Complexity level:
Project cost ($):
Time required:
1 day to prepare, 1 day for observation
Material availability:
Access to laboratory equipment
Safety concerns:

Scuba diving safety protocols and water safety measures to be strictly observed at all times. Should be performed only by an experienced adult.