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River pollutionFeatured science projectScience project video


The hypothesis that a sample of river water taken upstream is less polluted than a sample of river water taken downstream  is proven to be true.

Also consider

Try testing the quality of the water in lakes and ponds located at different distances from urbanized/densely populated areas.


Water pollution -

Common water measurements -

Earth’s water- rivers and sediment -

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Complexity level:
Project cost ($):
Time required:
1 day for preparation, 1 day for observation
Material availability:
You will require transportation to the various river locations
Safety concerns:

 Basic safety requirements