Table 3.
Mean value (standard error) of the mean of DBPs groups in relation to the disinfection system, using chlorinated or brominated products, differentiating within chlorinated pools, in turn, among indoor or outdoor ones. The families of DBPs in indoor pools are expressed in molar units, in addition to weight units.
| Disinfection type |
Chlorinated pools (n = 155) |
Brominated pools (n = 20) |
|||
|---|---|---|---|---|---|
| Type of pool | Indoor (n = 86) | Outdoor (n = 69) | p | Indoor (n = 20) | pa |
| Chloroform, μg/l | 16.6 (2.2) | 49.1 (5.2) | <0.001 | 1.2 (0.6) | 0.001 |
| ∑ THMs Br, μg/l | 2.4 (0.3) | 3.1 (0.3) | 0.096 | 48.2 (9.5) | <0.001 |
| ∑ THMs, μg/l | 19.0 (2.2) | 52.2 (5.3) | <0.001 | 49.4 (9.6) | <0.001 |
| ∑ THMs, μmol/l | 0.15 (0.02) | – | – | 0.20 (0.04) | 0.229 |
| ∑ HANs Cl, μg/l | 7.9 (0.8) | 15.3 (1.5) | <0.001 | 0.5 (0.1) | <0.001 |
| ∑ HANs Br, μg/l | 1.0 (0.2) | 0.5 (0.1) | 0.016 | 26.3 (6.5) | <0.001 |
| ∑ HANs, μg/l | 8.9 (0.8) | 15.8 (1.6) | <0.001 | 26.8 (6.5) | <0.001 |
| ∑ HANs, μmol/l | 0.08 (0.01) | – | – | 0.14 (0.03) | 0.007 |
| ∑ Hks, μg/l | 2.2 (0.5) | 22.0 (2.5) | <0.001 | 0.4 (0.1) | 0.079 |
| ∑ Hks, μmol/l | 0.01 (0.003) | – | – | 0.002 (0.001) | 0.079 |
| ∑ HAAs Cl, μg/l | 177.0 (18.4) | 497.6 (56.0) | <0.001 | 14.7 (1.7) | <0.001 |
| ∑ HAAs Br, μg/l | 11.9 (0.6) | 15.4 (0.8) | <0.001 | 147.8 (37.4) | <0.001 |
| ∑ HAAs. μg/l | 185.6 (18.5) | 508.8 (56.2) | <0.001 | 159.1 (36.5) | 0.532 |
| ∑ HAAs, μmol/l | 1.28 (0.13) | – | – | 0.75 (0.16) | 0.065 |
| Combined chlorine, mg/l | 0.23 (0.02) | 0.20 (0.02) | 0.418 | – | – |
a
Student t-test for brominated pools (all indoors) relative to indoor chlorinated pools.