Table 3.

Levels of faecal bacterial indicators in various water type categories

	Fecal indicator concentration (log cfu/100 ml)
	TC				FC				E. coli				CP				SFB
Sampling sites	PS (%)	M	R	CV (%)	PS (%)	M	R	CV (%)	PS (%)	M	R	CV (%)	PS (%)	M	R	CV (%)	PS (%)	M	R	CV (%)
BL	100	2.1	1.3–3.5	38	100	1.9	1–2.5	37	72	1.2	0.0–1.9	102	61	1.0	0.0–2.5	177	0	nd*	nd*	nd
BH	100	2.7	1.3–3.8	31	100	2.3	1–2.9	23	88	1.8	0.0–2.7	54	66	1.3	0.0–2.9	184	0	nd†	nd†	nd
OP	100	5.8	4.5–6.1	9	100	4.7	3.8–5.5	14	83	4.3	0.0–5.3	23	100	3.7	2.5–4.3	23	72	3.2	0.0–5.0	126
US	100	7.5	6.5–7.9	7	100	6.4	4.9–7.3	7	94	6.0	0.0–6.7	12	100	5.1	3.0–5.8	11	88	4.4	0.0–5.5	23
DS	100	7.8	7.0–8.6	8	100	6.9	6.1–7.7	9	100	6.7	5.8–7.2	6	100	5.6	5.0–6.7	7	100	5.8	4.7–6.8	23

^*SFB were not detectable (nd) above the median detection limit of log 0.28 cfu/100 ml (range log 0.1–1.7 cfu/100 ml).

^†SFB were not detectable (nd) above the median detection limit of log 0.60 cfu/100 ml (range log 0.1–1.5 cfu/100 ml).

Abbreviations: For BL, BH, OP, US and DS see Table 2, TC, Total coliform; FC, Faecal coliform; CP, Clostridium perfringens; SFB, Sorbitol-fermenting Bifidobacteria; PS, Percentage positive samples; M, Median; R, Range; CV, Percentage non-parametric-based coefficient of variations for the pooled data set ((p75–p25)/p50 × 100 where p75 and p25 are 75 and 25 percentiles, respectively, while p50 is a median); n = 5 habitats × 18 single samples