Table 4.

Spearman correlation coefficient (r) for faecal indicators and physicochemical parameters of ground- and surface waters^*

	TC	FC	E. coli	CP	SFB	TEMP	DO	EC	pH	SAL	BOD5	TSS	CHL	HARD
TC	1.00
FC	0.96	1.00
E. coli	0.86	0.90	1.00
CP	0.92	0.94	0.86	1.00
SFB	0.86	0.87	0.81	0.84	1.00
TEMP	−0.40	−0.47	−0.41	−0.46	−0.42	1.00
DO	− 0.09	− 0.08	− 0.14	− 0.17	− 0.15	− 0.01	1.00
EC	−0.62	−0.59	−0.58	−0.63	−0.62	0.35	0.12	1.00
pH	0.64	0.64	0.62	0.62	0.61	− 0.24	0.01	−0.48	1.00
SAL	−0.61	−0.58	−0.58	−0.62	−0.61	0.32	0.16	0.99	−0.48	1.00
BOD5	0.88	0.87	0.76	0.84	0.81	− 0.28	0.02	−0.55	0.63	−0.54	1.00
TSS	0.73	0.72	0.64	0.69	0.69	−0.37	0.05	−0.61	0.48	−0.59	0.79	1.00
CHL	−0.67	−0.66	−0.69	−0.71	−0.65	0.35	0.19	0.85	−0.44	0.84	−0.63	−0.63	1.00
HARD	−0.57	−0.53	−0.54	−0.59	−0.54	0.16	0.15	0.79	− 0.29	0.80	−0.56	−0.66	0.85	1.00
NO3− + NO2−	−0.49	−0.50	−0.45	−0.55	−0.47	0.42	− 0.16	0.42	−0.52	0.40	−0.51	−0.45	0.43	0.32

^*Correlation significant on p < 0.05 (Bonferroni corrected for multiple testing). All values are significant except those italic. See Tables 2 and 3 for TC, FC, CP, SFB, BOD₅, DO, TEMP and TSS abbreviations. EC, Electrical conductivity; SAL, Salinity; CHL, Chlorides; HARD, Hardness; n = 75–90 samples per parameter.