| for stopping the spread of disease | 12 | purpose |
| in the water distribution system | 9 | location |
| at the treatment plant | 4 | location |
| chlorine → be → essential | 22 |
| chlorine → be → vital | 9 |
| chlorine → be → important | 4 |
| chlorine → be → crucial | 3 |
| chlorine → be → critical | 3 |
| negative | neutral | positive |
| 0.173 | 0.547 | 0.280 |
| Raw frequency | 41 |
| Normalized frequency | 0.633 |
| Modifier score | 0.500 |
| Perplexity | 60.991 |