Table 2. Mantel test statistics for correlations between Bray-Curtis distances of bacterial communities and environmental parameters for chlorine and chloramine-treated samples.

P-values are reported using Municipality as a nested variable. Significant P-values (<0.05) are in bold.

	Chlorine (n = 56)		Chloramine (n = 9)
	r	P-value	r	P-value
Al	0.254	0.603	0.281	0.157
As	-0.033	0.73	0.44	0.013
Ba	0.173	0.806	0.2	0.585
Ca	0.117	0.586	0.378	0.042
Cd	-0.0349	0.73	0.319	0.142
cellCounts	0.2007	0.061	-0.011	0.704
Cr	-0.009	1	-0.298	0.981
Cu	-0.027	0.49	0.365	0.125
DO%	0.088	0.456	0.085	0.588
Fe	0.145	0.036	-0.164	0.888
Fl	0.156	0.421	0.203	0.591
freeCl	0.2791	0.001	0.246	0.146
K	0.147	0.532	0.374	0.006
Mg	0.13	0.298	0.361	0.224
Mn	0.14	0.098	0.102	0.387
Na	0.012	0.153	0.37	0.096
NO3	0.142	0.047	0.18	0.282
pH	0.184	0.094	-0.089	0.592
PO4	0.082	0.252	0.159	0.5
redoxPotential	0.153	0.012	-0.25	0.849
salinity	0.074	0.034	0.372	0.229
Sb	0.054	0.348	0.149	0.256
Se	-0.023	0.069	0.263	0.123
SO4	0.183	0.28	0.358	0.216
combinedCl	0.2403	0.001	0.102	0.333
waterTemp	0.045	0.116	-0.066	0.797
Zn	-0.059	0.665	0.334	0.097