Table 2 The assigned weight, relative weight and WHO quality guidelines used in the GWQI calculation.
Parameters | WHO standard (2017, 2022) | Weight (\(w_{i}\)) | Relative weight (\(W_{i}\)) |
|---|---|---|---|
pH | 6.5–8.5 | 2 | 0.067 |
TDS | 500 | 5 | 0.167 |
Ca2+ | 75 | 2 | 0.067 |
Mg2+ | 20 | 2 | 0.067 |
Na2+ | 200 | 2 | 0.067 |
K+ | 10 | 2 | 0.067 |
\(SO_{4}^{2 - }\) | 250 | 5 | 0.167 |
Cl- | 250 | 3 | 0.096 |
\(NO_{3}^{ - }\) | 50 | 5 | 0.167 |
\(HCO_{3}^{ - }\) | 125 | 3 | 0.096 |
| Â | \(\sum {w_{i} = 31}\) | \(\sum {W_{i} = 1.028}\) | |
