TABLE 1.
Biophysicochemical parameters of water samples collected from five tube-wells in Matlab, Bangladesh
| Parameters | Value in tube-well:
|
World Health Organization guideline value | ||||
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | ||
| Depth (ft) | 180 | 60 | 180 | 180 | 120 | NGVa |
| Total zooplankton/liter | 1.4 × 103 | 2.8 × 103 | 1.3 × 103 | 2.1 × 103 | <1 | NGV |
| Total viable (culturable) bacteria/ml | 3.0 × 101 | 3.2 × 102 | 1.3 × 102 | 6.0 × 102 | 8.5 × 102 | <103 |
| Total coliforms/100 ml | 1.7 × 101 | <1 | 1.0 × 101 | <1 | 1 | 0 |
| Fecal coliforms/100 ml | 1.0 × 101 | <1 | 7 | <1 | 1 | 0 |
| AODTCb/ml | 4.27 × 105 | 1.58 × 107 | 1.22 × 106 | 1.41 × 106 | 2.35 × 106 | NGV |
| AODVCc/ml | 9.49 × 104 | 1.30 × 107 | 6.76 × 105 | 6.17 × 105 | 1.05 × 106 | NGV |
| pH | 6.39 | 7.07 | 6.27 | 6.29 | 6.56 | 6.5–8.5 |
| Conductivity (μS/cm) | 1,676 | 1,997 | 1,705 | 1,654 | 1,533 | NGV |
| TDS (mg/liter) | 780 | 994 | 855 | 819 | 755 | <1000 |
| Salinity (‰) | 0.8 | 1.0 | 0.9 | 0.8 | 0.8 | NGV |
| Hardness (mg/liter) | 406 | 678 | 412 | 383 | 390 | <500 |
| Arsenic (mg/liter) | <0.1 | >0.1 | <0.1 | <0.1 | <0.1 | <0.01 |
a
NGV, no guideline value.
b
AODTC, acridine orange direct total counts.
c
AODVC, acridine orange direct viable counts.