Dissolved Oxygen - A chemical indicator that tells how much oxygen is dissolved in the water. GOOD water has HIGH levels so aquatic animals can breathe., Temperature - A physical indicator that tells how hot or cold the water is. GOOD water has a LOW level because it holds more DO and slows bacteria growth., Turbidity - A physical indicator that tells how cloudy the water is. GOOD water has LOW levels which means the water is clear and easy to see through., pH - Measures the acidity of water. Organisms are very sensitive to changes. This is measured on the pH scale., Nitrate - A chemical indicator that indicates the water is contaminated by animal waste (poop) or fertilizer (poop). GOOD water has LOW levels. These lead to the overgrowth of aquatic bacteria., Bioindicators - An organism that is sensitive to environmental conditions and is one of the first to respond to changes; Some are visible with the naked eye and some require a microscope., point source pollution - pollution that can be traced to one location such as a drainpipe or a smokestack, non-point source pollution - pollution that cannot be traced to one location, such as runoff from lawns, roads, farms, and factories,

Water Quality Indicators

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