Table 1.
The criteria and risk categories of microbial water qualities used in this study.
| Criteria | Risk Category used in this study | WHO Remarks for E. coli or fecal coliform in water supplies |
|---|---|---|
| No bacteria were present | 0 | In conformity with WHO guidelines |
| 1–10 CFU/mL for both total coliform and non-coliforms. No fecal coliform present | 1 | In conformity with WHO guidelines |
| 10–100 CFU/mL for both total coliform and non-coliforms. No fecal coliform present | 2 | Low risk |
| 100–1000 CFU/mL for both total coliform and non-coliforms. No fecal coliform present | 3 | Low risk |
| 10–100 CFU/mL for both total coliform and non-coliforms. 1 CFU/ml fecal coliform present | 4 | Intermediate risk |
| 10–100 CFU/mL for both total coliform and non-coliforms. 2–10 CFU/ml fecal coliform present | 5 | High risk |
| 100–1000 CFU/mL for both total coliform and non-coliforms. 1 CFU/ml fecal coliform present | 6 | Intermediate risk |
| 100–1000 CFU/mL for both total coliform and non-coliforms. 2–10 CFU/ml fecal coliform present | 7 | High risk |
| 100–1000 CFU/mL for both total coliform and non-coliforms. 10–100 CFU/ml fecal coliform present | 8 | Very high risk |