Table 3
Total trihalomethane concentration, mean concentration of brominated trihalomethanes*, proportion brominated species, bromine incorporation factor (BIF), and exposure profile number for nine predominantly brominated sites selected using ANOVA and cut-point methods
| Method | Facility | Mean TTHM (μg/l) | Mean brominated THMs (μg/l) | % brominated species | BIF | Exposure profile |
|---|---|---|---|---|---|---|
| *Bromodichloromethane, dibromochloromethane, bromoform. | ||||||
| †Site had medium average TTHM concentrations (40 μg/l ⩽ mean TTHM < 80 μg/l) and was not classifiable into any profile. | ||||||
| ‡Site 413 was counted only once in the summary statistics. | ||||||
| ANOVA | 126 | 118.4 | 51.3 | 54.0 | 1.54 | 1 |
| 567† | 43.7 | 23.0 | 52.9 | 1.50 | – | |
| 163 | 32.2 | 19.0 | 60.1 | 1.51 | 3 | |
| 413 | 19.4 | 9.6 | 51.3 | 1.33 | 3 | |
| Cut-points | 132† | 51.8 | 36.6 | 62.7 | 1.50 | – |
| 535 | 24.1 | 18.9 | 78.7 | 1.77 | 3 | |
| 415 | 19.9 | 9.8 | 51.0 | 1.34 | 3 | |
| 355 | 19.4 | 10.0 | 52.5 | 1.36 | 3 | |
| 413 | 19.4 | 9.6 | 51.3 | 1.33 | 3 | |
| 416 | 19.0 | 9.2 | 50.0 | 1.32 | 3 | |
| Summary‡ statistics | Mean | 34.9 | 17.8 | 55.7 | 1.44 | |
| SD | 32.2 | 13.6 | 9.1 | 0.15 | ||
| Median | 20.2 | 10.0 | 52.5 | 1.36 | ||
