Canadian WQI

Dear Tiwari,

1. For drinking water, I prefer CWQI, and

2. For irrigation WQ, I prefer the IWQI that used by Simsek and Gunduz 2007.

Good Luck

https://www.researchgate.net/publication/325525603_Geochemical_and_geostatistical_appraisal_of_fluoride_contamination_An_insight_into_the_Quaternary_aquifer

Candia WQI

Candia WQI is best one

Candia WQI

Hell Dear Siva Kumar

I recommend Water Quality Index (Canadian Council of Ministers of the Environmental)

In 1997, the Water Quality Guidelines Task Group of the Canadian Council of Ministers of the Environment (CCME) decided to review various existing techniques for the calculation of WQIs. Their efforts led to the development of a standardized system i.e. a unified water quality index that has been employed in all parts of Canada for the assessment of water quality (CCME 1997, 2001, 2003).

The CCME WQI offers several advantages over other methods, including compliance with different legal requirements and different water uses, eligibility for water quality assessment in specific areas, flexibility in the selection criteria, and tolerance for missing data.

Note

For the calculation of CCME WQI see the attached file

Hello Dear Siva Kumar

Water quality irrigation indices are : Sodium adsorption ratio (SAR) , Sodium percentage (Na%), Residual sodium carbonate (RSC), Permeability index (PI)

See the attached file for the calculation formulas of these indices

Best regards

Fatah BOUTELDJAOUI

Hello Dear Siva Kumar

water quality index for drinking water

The water quality index (WQI) is widely used for the evaluation of the quality of drinking water.

In the first step the selected water quality parameters (TDS, pH, Ca2+, Mg2+, Na+, HCO3-, K+, Cl-, SO42-, NO3-) were assigned a weight according to its relative importance in the overall quality of groundwater for drinking purposes. The maximum weight of 5 is given to: TDS and NO3- because these parameters are important indicators for assessment of the overall water quality.

See the attached file for the stages of calculating of this index