Water Quality Index Calculator
Calculate a simplified water quality index (WQI) from dissolved oxygen, pH, turbidity, and temperature parameters.
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Water Quality Index
74.3 WQI
DO Contribution22.5 points
Turbidity Contribution14.0 points
Nutrient Contribution13.0 points
Water Quality Index vs Dissolved Oxygen Score
How to Calculate Water Quality Index
The WQI combines multiple water quality parameters into a single score.
Formula
WQI = DO(0.30) + pH(0.15) + Turbidity(0.20) + Temp(0.15) + Nutrients(0.20)
Rating Scale
Each parameter is first converted to a 0-100 sub-index score based on its measured value.
Example Calculation
A water body with DO=75, pH=80, Turbidity=70, Temperature=85, Nutrients=65.
- 01DO: 75 * 0.30 = 22.5
- 02pH: 80 * 0.15 = 12.0
- 03Turbidity: 70 * 0.20 = 14.0
- 04Temperature: 85 * 0.15 = 12.75
- 05Nutrients: 65 * 0.20 = 13.0
- 06WQI = 22.5 + 12.0 + 14.0 + 12.75 + 13.0 = 74.3 (Good)