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Water quality data of five groups of water sample.
| Water Quality Item | Group 1 | Group 2 | Group 3 | Group 4 | Group 5 |
|---|---|---|---|---|---|
| Water temperature (°C) | 24.5 | 24.5 | 24.5 | 24.5 | 24.5 |
| pH | 6.9 | 6.6 | 7.1 | 7.4 | 7.6 |
| Conductivity (us/cm) | 276 | 430 | 657 | 1543 | 2000 |
| DO (mg/L) | 7.3 | 5.9 | 4.7 | 2.85 | 1.2 |
