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Positive Legionella samples after monochloramine treatment. Adapted from [101].
| Treatment | Positive Samples | |
|---|---|---|
| Before Treatment | After Treatment | |
| Monochloramine system | ||
| - positive N (%) | 22/22 (100%) | 8/84 (9.5%) |
| - mean CFU/L (range) | 2.2 × 104 (1.0 × 102 – 9.5 × 105) | 3.3 × 102 (25 – 4.9 × 103) |
| Control system | ||
| - positive N (%) | 84/85 (98.8%) | |
| - mean CFU/L (range) | 1.0 × 104 (25 – 1.3 × 106) | |
