Table 1.
Mean bacterial counts (log CFU/ml or CFU/100 ml) of drinking water samples of different sources (n = 90) at Serbo town and its surroundings, 2012
| Parameters | Water sample sources | |||||
|---|---|---|---|---|---|---|
| Tap water | Protected wells | Unprotected wells | Protected springs | Unprotected springs | ||
| AMB (log CFU/ml) | Mean | 3.05 | 3.53 | 4.39 | 4.03 | 5.25 |
| SD | 3.12 | 3.72 | 4.55 | 4.20 | 5.84 | |
| %CV | 117.51 | 157.77 | 142.74 | 149.26 | 111.25 | |
| Enterobacteriaceae (log CFU/ml) | Mean | 2.59 | 3.50 | 4.06 | 3.61 | 4.38 |
| SD | 2.65 | 3.59 | 4.01 | 3.68 | 4.63 | |
| %CV | 113.96 | 123.25 | 89.29 | 116.13 | 105.69 | |
| ASF (log CFU/ml) | Mean | 2.82 | 2.88 | 2.63 | 3.24 | 3.60 |
| SD | 0.31 | 2.99 | 2.73 | 3.16 | 3.49 | |
| %CV | 11.00 | 128.28 | 125.42 | 84.51 | 97.00 | |
| TC (CFU/100 ml) | Mean | 9.67 | 33.00 | 424.89 | 30.60 | 307.06 |
| SD | 12.93 | 46.95 | 532.90 | 49.56 | 288.25 | |
| %CV | 133.72 | 142.26 | 125.42 | 161.98 | 9.92 | |
| FC (CFU/100 ml) | Mean | 0.53 | 6.00 | 93.33 | 3.40 | 105.93 |
| SD | 0.83 | 6.64 | 106.55 | 4.82 | 94.92 | |
| %CV | 156.34 | 110.73 | 114.16 | 141.84 | 97.65 | |
ASF aerobic spore formers, TC total coliform, FC fecal coliforms, SD standard deviation %CV percent of coefficient of variation