Water Quality Index (WQI) Calculator
Assess overall surface water quality using a weighted index of dissolved oxygen, pH, BOD, nitrate, and turbidity measurements. Ideal for environmental monitoring and citizen science.
Water Quality Index (WQI)
intermediateCalculate simplified water quality index from key parameters
Formula
WQI = Σ(wi × qi)
Scenario A
How It Works
This simplified WQI calculates sub-indices for each parameter (scored 0-100) and combines them using weighted averages:
DO (20%), pH (15%), BOD (20%), Nitrate (15%), Turbidity (15%)
Quality Categories: Excellent (90-100), Good (70-89), Fair (50-69), Poor (25-49), Very Poor (0-24)
Frequently Asked Questions
What is a good WQI score?
WQI scores range 0-100. Scores above 70 indicate good water quality suitable for most uses. Scores below 50 indicate degraded water quality requiring remediation.
What is BOD?
Biochemical Oxygen Demand (BOD) measures the amount of oxygen consumed by microorganisms decomposing organic matter. Higher BOD indicates more organic pollution.
Save Configuration Snapshot
Save current parameters to your dashboard for instant one-click reloading.
About This Calculator & Guide
About the Water Quality Index (WQI) Calculator
The Water Quality Index (WQI) Calculator is a specialized online utility designed to help you calculate a simplified water quality index from dissolved oxygen, ph, bod, nitrate, and turbidity. free online wqi calculator. It performs calculations in real-time to provide immediate, reliable estimates for study, work, or daily tasks.
How to Use
Simply enter your parameters in the input fields of the calculator widget above. The tool evaluates the inputs instantly and displays the results in real-time. You can modify any value to check alternate scenarios and compare figures dynamically.
Data Privacy & Safety
All calculations are executed locally within your web browser. No inputs are sent to our servers or stored externally, ensuring your personal and financial details remain completely private and secure.
FAQ
Frequently Asked Questions
What does the Water Quality Index (WQI) Calculator do?+
Calculate a simplified water quality index from dissolved oxygen, pH, BOD, nitrate, and turbidity. Free online WQI calculator. It is designed for quick everyday use and gives clear results without requiring a sign in.
Is the Water Quality Index (WQI) Calculator free to use?+
Yes. The Water Quality Index (WQI) Calculator is free to use online and works directly in your browser.
Can I use the Water Quality Index (WQI) Calculator on mobile?+
Yes. The calculator layout is responsive, so you can use it on phones, tablets, laptops, and desktop screens.