Table 4.

Pearson's correlation coefficients for DBPs and pH, and Spearman's Rho for conductivity, turbidity and residual free chlorine in chlorinated and brominated pools.

	Chloroform	∑ THMs Br	∑ THMs	∑ HANs Cl	∑ HANs Br	∑ HANs	∑ HKs	∑ HAAs Cl	∑ HAAs Br	∑ HAAs	Combined Cl
Chlorinated pools (n = 155)
∑ THMs Br	0.299*	–
∑ THMs	0.998*	0.361*	–
∑ HANs Cl	0.525*	−0.072	0.508*	–
∑ HANs Br	−0.103	0.400*	−0.073	0.050	–
∑ HANs	0.507*	−0.027	0.494*	0.994*	0.159*	–
∑ HKs	0.497*	0.009	0.487*	0.770*	−0.033	0.758*	–
∑ HAAs Cl	0.442*	−0.162*	0.421*	0.693*	−0.106	0.674*	0.604*	–
∑ HAAs Br	0.298*	0.399*	0.318*	0.186*	0.146	0.200*	0.345*	0.336*	–
∑ HAAs	0.444*	−0.155	0.423*	0.693*	−0.104	0.673*	0.606*	0.999*	0.347*	–
Combined chlorine	0.027	−0.094	0.020	0.212*	−0.031	0.206*	0.022	0.217*	0.152	0.218*	–
pH	−0.006	0.040	−0.003	−0.316*	−0.149	−0.328*	−0.304*	−0.005	−0.014	−0.005	−0.108
Conductivitya	0.437*	−0.247*	0.379*	0.491*	−0.201*	0.457*	0.512*	0.637*	−0.024	0.627*	−0.177*
Turbiditya	0.168*	−0.126	0.161*	0.324*	−0.033	0.315*	0.254*	0.263*	0.021	0.259*	0.275*
Free chlorine	0.035	0.121	0.050	−0.045	0.083	−0.037	−0.017	0.057	0.191*	0.060	0.191*
Brominated pools (n = 20)
∑ THMs Br	0.092	–
∑ THMs	0.151	0.998*	–
∑ HANs Cl	0.693*	−0.078	−0.036	–
∑ HANs Br	−0.312	0.645*	0.621*	−0.234	–
∑ HANs	−0.302	0.646*	0.623*	−0.219	0.999*	–
∑ HKs	0.902*	0.078	0.131	0.849*	−0.227	−0.215	–
∑ HAAs Cl	0.483*	−0.350	−0.319	0.429	−0.383	−0.377	0.492*	–
∑ HAAs Br	−0.217	0.756*	0.737*	−0.280	0.939*	0.938*	−0.204	−0.464	–
∑ HAAs	−0.201	0.754*	0.736*	−0.269	0.940*	0.939*	−0.188	−0.431	0.999*	–
pH	0.370	0.008	0.030	0.219	−0.347	−0.345	0.384	0.456	−0.355	−0.342	–
Conductivity	0.259	0.542*	0.546*	0.013	0.047	0.063	0.252	−0.055	0.137	0.108	–
Turbidity	−0.306	0.082	0.073	−0.253	0.500*	0.457	−0.296	−0.559*	0.536*	0.507*	–

*: p < 0.05.

^aSpearman's Rho coefficients; remainder Pearson's correlation coefficients.