What is the index of water pollution?
Water pollution index (WPI) The proposed index, WPI is based on the standard permissible limits of groundwater parameter recommended by the BIS and WHO. In this study, WPI for each sample was calculated to evaluate the degree of pollution in groundwater for drinking purpose using 19 water quality parameters (n = 19).
How is water quality index calculated?
The WQI is calculated by averaging the individual index values of some or all of the parameters within five water quality parameter categories:
- Water clarity: turbidity (NTU*) and/or Secchi disk depth (meters or feet);
- Dissolved oxygen: Dissolved oxygen concentration (mg/l);
Who published water quality index?
Global Drinking Water Quality Index Development and Sensitivity Analysis Report | UNEP – UN Environment Programme.
What is the best water quality index?
Very Good: (WQI Value 89-94) – Water quality is protected with a slight presence of impairment; conditions are close to pristine levels. Good: (WQI Value 80-88) – Water quality is protected with only a minor degree of impairment; conditions rarely depart from desirable levels.
WHO releases water quality index?
What is water quality index in India?
Globally, India is ranked 120th among 122 countries in WaterAid’s water quality index. Given such state of affairs, ranking cities on water quality is nothing more than a naming and shaming exercise.
What is water quality index definition?
A water quality index is a weighted average of selected ambient concentrations of pollutants usually linked to water quality classes.
Which state has best water quality in India?
The rank is based on the percentage of households which have access to safe drinking water. Punjab ranked highest with 97.6%, while Kerala has the worst rank with only 33.5% households having access to safe drinking water. National average stands at 85.5%.
How is water pollution measured?
7 Ways to Measure, Monitor, and Evaluate Water Quality
- CDOM/FDOM Monitoring.
- Chlorophyll Fluorescence Analysis.
- Conductivity, Salinity, and TDS Monitoring.
- Recording the Water Temperature.
- Measuring the Dissolved Oxygen Levels.
- pH and KH Testing.
- Assessing the Turbidity, TSS and Clarity.
What is water quality index?
The index was first developed by Horton in 1965 to measure water quality by using 10 most regularly used water parameters. The method was subsequently modified by different experts. These indices used water quality parameters which vary by number and types.
What is Journal of water pollution and control?
Journal of Water Pollution and Control is an open access peer reviewed periodical aimed to cause and source of water pollution and way of controlling it.
Is there a global composite index of water quality?
In spite of absence of a globally accepted composite index of water quality, some countries have used and are using aggregated water quality data in the development of water quality indices. Attempts have been made to review the WQI criteria for the appropriateness of drinking water sources.
What is a good WPI for water quality?
WPI suggested four categories of water quality: WPI < 0.5 signifies an excellent quality, 0.5 > WPI < 0.75 indicates good quality, 0.75 > WPI < 1 is moderately polluted water, whereas if WPI > 1, indicates highly polluted water.