Table 2.
Concentration of E. coli O157: H7 in drinking water and log10 reduction values.
| Sample source | E. coli O157: H7 (MPN/100 ml) | ||||||
|---|---|---|---|---|---|---|---|
| Mean | SE | SD | Left | Right | Max | Min | |
| Water wells (C0) | 4.355 | 3.297 | 17.364 | 1.058 | 7.652 | 112 | 0 |
| Desalination plants (CDP) | 0.541 | 0.574 | 3.023 | −0.033 | 1.115 | 20.9 | 0 |
| Tanker trucks (CTR) | 0.93 | 0.685 | 4.876 | 0.245 | 1.615 | 39.5 | 0 |
| Desalinated water at households (CHD) | 0.598 | 0.412 | 4.107 | 0.186 | 1.01 | 39.2 | 0 |
| Municipal water at households (CHT) | 1.725 | 0.797 | 7.944 | 0.928 | 2.522 | 72.9 | 0 |
| Private wells (CPW) | 5.696 | 4.163 | 17.067 | 1.533 | 9.859 | 112 | 0 |
| Private well water at households (CHP) | 9.097 | 5.246 | 21.506 | 3.851 | 14.343 | 101.2 | 0 |
| DWSS reference points | log10 reduction value (Log) | ||||||
| Mean | SE | SD | Left | Right | Max | Min | |
| LRV1 | 2.715 | 0.221 | 11.25 | 2.494 | 2.936 | 82.202 | −46.233 |
| LRV2 | 7.09 | 0.29 | 14.817 | 6.8 | 7.38 | 111.907 | −52.24 |
| LRV3 | −1.465* | 0.348 | 17.75 | −1.813 | −1.117 | 92.552 | −107.684 |
| LRV4 | 8.5 | 0.473 | 24.137 | 8.027 | 8.973 | 208.069 | −95.721 |
| LRV5 | −1.465* | 0.088 | 4.513 | −1.553 | −1.377 | 22.915 | −36.819 |