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Water Quality


Nitrates A chemical form of nitrogen found in water. Common in sewage and fertilizer. Can cause algal blooms that block sunlight and use up oxygen when present in large quantities.
Phosphates A chemical form of phosphorous found in water. Common in sewage and fertilizer. Can cause algal blooms that block sunlight and use up oxygen when present in large quantities.
Turbidity The relative clarity (clearness) of the water.
Bioindicators Living organisms (usually macroinvertebrates) whose presence or absence tell us about the quality of the water.
Pollution tolerant Organisms that can tolerate (live with) pollution
Pollution intolerant Organisms that CANNOT tolerate (live with) pollution
pH A measure of the relative acidity or alkalinity of water. The pH scale goes from 0-14. A pH of 7 is neutral (pure water). pH values below 7 are acids; pH values above 7 are bases (alkalines)
Run-off Water that does not soak into the ground, but instead runs over the land into streams and lakes
Dissolved oxygen The oxygen in the water that is available for aquatic life. Fast moving, cool water has more dissolved oxygen. Slow moving, warm water has less dissolved oxygen.
Temperature A measure of how hot or cold the water is. Warm water tends to have less dissolved oxygen.
Created by: cyclonescience
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