Table 2.

Thermotolerant coliforms, E. coli and Salmonella spp. concentrations in the four sampling systems along the Nakivubo channel in Kampala (sampling period: 15 October to 5 December 2013)

Sampling system	Counts in CFU/100 mL
Bacteria in water	Min	Max	Mean	Lower 95 % CI	Upper 95 % CI
Nakivubo channel (n = 112)
Thermotolerant coliforms	1.2 × 103	1.8 × 108	4.3 × 106a	2.7 × 106a	6.9 × 106a
E. coli	8.4 × 102	9.0 × 107	3.8 × 105a	2.3 × 105a	6.4 × 105a
Salmonella spp.	0.0	2.0 × 105	3.8 × 102	2.5 × 102	5.7 × 102
Nakivubo wetland (n = 48)
Thermotolerant coliforms	4.0 × 102	2.2 × 108	2.9 × 105a	1.0 × 105a	8.0 × 105a
E. coli	1.0 × 102	7.9 × 107	9.9 × 104a	3.6 × 104a	2.7 × 105a
Salmonella spp.	0.0	1.2 × 105	1.4 × 102	63.0	3.2 × 102
Community areas (n = 8)
Thermotolerant coliforms	4.2 × 103	3.1 × 109	1.5 × 107a	8.4 × 104	2.9 × 109a
E. coli	1.9 × 103	6.0 × 107	7.3 × 105a	1.8 × 104	2.9 × 107a
Salmonella spp.	36.0	6.0 × 102	99.0	35.0	2.8 × 102
Lake Victoria (n = 32)
Thermotolerant coliforms	0.0	40.0	3.7	2.3	6.0
E. coli	0.0	11.0	1.3	1.1	1.7
Salmonella spp.	0.0	8.0	1.3	1.0	1.6

The minimum and maximum concentration, geometric mean and 95 % confidence intervals (CIs) for Student’s t test are indicated

^aConcentrations exceeding maximum acceptable concentrations for faecal coliforms (NEMA 1999) and E. coli (WHO 2006)