water quality indices
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National Sanitation Foundation
Parameters: Temperature, pH, Dissolved Oxygen, Turbidity, Fecal Coliform, Biochemical Oxygen, Total Phosphates, Nitrates, Total Suspended Solids
Links:
- Calculator: Here you can input data about any number of parameters and have a WQI result level. The page have charts relating the water quality value derived with the level of each parameter.
- National Sanitation Foundation Water Quality: Explains the index.
UNEP
Parameters: Dissolved Oxygen, pH, Conductivity, Nitrogen, Phosphorus
Links:
- Water Quality Index and Indicators: explains the calculation ('Global Drinking Water Quality Index' section)
- Water Quality: Development of an index to assess country performance