Table 5.
One-sample t-test analysis between the mean values and maximum permissible limits of water quality indicatorsa (Significance level p < 0.05).
| WQ indicators | df | t | p-value |
|---|---|---|---|
| Temp. | 17.0 | −4.46 | <0.050 |
| pH | 17.0 | −9.52 | <0.050 |
| EC | 17.0 | −15.1 | <0.050 |
| TDS | 17.0 | −20.1 | <0.050 |
| TA | 17.0 | 1.68 | 0.110 |
| TH | 17.0 | −13.2 | <0.050 |
| HCO3− | 17.0 | −48.6 | <0.050 |
| Cl− | 17.0 | −59.5 | <0.050 |
| PO43- | 17.0 | −41.8 | <0.050 |
| SO42- | 17.0 | −31.1 | <0.050 |
| NO2− | 17.0 | −36.4 | <0.050 |
| NO3− | 17.0 | −15.6 | <0.050 |
| Na+ | 17.0 | −9.05 | <0.050 |
| K+ | 17.0 | 4.09 | <0.050 |
| Ca2+ | 17.0 | −102 | <0.050 |
| Mg2+ | 17.0 | −12.4 | <0.050 |
a
TOC excluded from analysis for having guideline limits.