Table 1.
Physicochemical analyses of tanks 1 (T1) and 2 (T2) and the artesian well (AW).
| Parameters | T1 | T2 | AW | WHO |
|---|---|---|---|---|
| Chlorine (mg/L) | 1.7 ± 0.1A | 1.6 ± 0.0A | 0 ± 0.0B | 0.7C |
| Conductivity (μS/cm) | 418.3 ± 2.0A | 413.0 ± 0.7A | 13.6 ± 0.6B | 10–100B |
| Color (Pt/Co) | 245.0 ± 1.5A | 250.0 ± 0.0B | 0.0 ± 0.0C | 0C |
| Fluorine (mg/L) | 0.8 ± 0.0A | 0.8 ± 0.0A | 0.1 ± 0.0B | 1.5C |
| pH at 25 °C | 5.5 ± 0.1A | 5.3 ± 0.0A | 4.8 ± 0.1B | 6.5–8.5C |
| TDS (ppm/NaCl) | 186.3 ± 1.0A | 183.2 ± 0.3A | 0.0 ± 0.0B | 100–600A |
| Turbidity (NTU) | 204.0 ± 5.8A | 206.3 ± 3.6A | 0.3 ± 0.0B | 1C |
| BOD | 80.3 ± 1.5A | 69.0 ± 4.6B | ND | 0C |
| COD | 1352.3 ± 29.0A | 1105.0 ± 35.5B | ND | 0C |
The parameter values are presented as the means from triplicate measurements ±standard deviation. WHO: World Health Organization; TDS: total dissolved solids; BOD: biochemical oxygen demand; COD: chemical oxygen demand; and ND: not detected. The letters A, B, C, and D indicate significant differences within each row.