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WQI Tests:
- Dissolved Oxygen
- Fecal Coliform- bacteria primarily found in the intestines of humans and animals
- pH- measure of acidity or bascitiy in the water
- Biological Oxygen Demand (BOD)
- Temperature
- Total Phosphate
- Nitrates
- Turbidity
- Total Solids- amount of sediment in the water
Sample WQI Curve Chart
Sample WQI Curve Chart
For example, a dissolved oxygen curve chart is shown above. If the raw data number found was found. First, find 40 on the x-axis and then move straight up to the curve chart line and then read the Q-value which is plotted on the y-axis. In this case, the Q-value would be a 30. Then the Q value is placed on the WQI form shown below. The Q-value is then multiplied by the weighing factor in the next column giving a total. All of the totals are added together giving an Overall Water Quality Rating.
Overall Water Quality Index ______________
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