Indicators of Water Quality

pH Scale

The pH scale range goes from zero to fourteen. It measures how acidic or basic a substance is. From zero from seven is acidic as seven to fourteen is basic. The more low the the numbers go the more acidic or basic they get. For example an acid measured one will be a lot more acidic than an acid measured three. But you may ask what is seven being between both acidic and basic substances.The measure 7 is actually water.Anything below or higher than it is acidic or basic.

Dissolved Oxygen

Dissolved oxygen is the product of photosynthesis and diffusion. In the water aquatic animals need at least five or six parts per million to survive. In cold temperatures water holds more oxygen. In colder temperatures it holds less oxygen. But even in cold temperatures water rarely even holds 15 parts per million. The aquatic animals will swim deeper or higher depending on how much oxygen they need. Summer for the animals though is very rough.

Bio Indicators

A bio indicator is a living organism that gives us an idea of how healthy our ecosystem is. Some organisms are very sensitive to pollution so if there is any it will change behavior or change physical shape or form. For example lichens. They receive most of their nutrients from air so if there is any toxic or pollutant it will highly react.


Temperature is very important to aquatic life. Without the right temperature aquatic life could die very quickly. Most aquatic organisms life in water 32 degrees fahrenheit to 40 degrees fahrenheit. But rapid temperature change can stress aquatic life and possibly kill them.


Nitrates are salts or ester of nitric acid containing the anion No3 or -No3. Most nitrate salts are soluble in water at standard temperature and pressure. An example of a nitrate salt is potassium.


Turbidity is the measure of how much material is suspended in water decreases the passage of light through the water. The suspended material includes clay, silt, sand, and anything else eroded from land.There are also organisms such as plankton, algae, and microbes. One big production of this is boat wakes hitting the shore. You wouldn't think it would cause anything but every day it puts a little bit more of sediment into the water.