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It is observed that the levels of acidity, ammonia content and nitrate found in the water samples did not change significantly regardless of the depth at which these samples were obtained. However, the turbidity of the water increased as the depth of water increased.

Water depth Tests done on water samples
  Acidity (pH) Turbidity (NTU) Ammonia (ppm) Nitrate (ppm)
1 meter 6.9 2.1 1.2 1.4
2 meters 6.8 2.4 1.3 1.5
3 meters 6.8 2.9 1.2 1.4
4 meters 6.8 3.3 1.2 1.4

The graph below represents the results of our science fair project experiment:

water pollution science fair project

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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.