Table 3 Bacteriological parameters in relation to residual chlorine
From: Environmental health aspects and microbial infections of the recreational water
Residual chlorine (ppm) | No of examined samples | Total colony count (TCC) | Total coliform (TC), n(%) | ||
|---|---|---|---|---|---|
< 100 cfu/ml | \(\ge\)100 cfu/ml | < 1 cfu/100ml | \(\ge\)1 cfu/100ml | ||
1–1.5 | 22 | 2(33.3%) | 20(27.8%) | 18(29.5) | 4(23.5) |
> 1.5 | 56 | 4(66.7%) | 52(72.2%) | 43(70.5) | 13(76.5) |
Total | 78 | 6 | 72 | 61 | 17 |
Range | (30 -15\(\times\)109) | (0–1609) | |||
Mean\(\pm\)SD | 38.3 × 107 ± 24.1 × 108 | 22.72 ± 182.19 | |||
Median | 2 × 105 | 0 | |||
Test of significance | FEp 1 | FEp 0.766 | |||