Table 1.
Mean value and standard deviation for physicochemical and microbiological parameters, along La Paz River basin water, soil and vegetable sampling points
| Site no./samples (N) | pH | Temperature (°C) | Conductivity (μS/cm) | Redox potential (mV) | Thermotolerant coliform density MPNa,b | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
| Water (N = 12) | ||||||||||
| 1 | 6.84 | 1.10 | 9.46 | 1.64 | 172.83 | 97.28 | −25.15 | 38.87 | 3.73 × 101 | 9.88 × 101 |
| 2 | 7.93 | 0.43 | 12.73 | 1.87 | 1303.50 | 351.07 | −82.62 | 6.62 | 1.42 × 10 6 | 1.90 × 106 |
| 3 | 7.81 | 0.48 | 18.78 | 2.50 | 1216.90 | 341.74 | −76.71 | 11.23 | 3.08 × 10 5 | 1.87 × 105 |
| 4 | 7.64 | 0.65 | ND | ND | 750.48 | 253.04 | −68.45 | 16.81 | 3.05 × 10 5 | 3.77 × 105 |
| 3/soil (N = 12) | NA | NA | NA | NA | NA | NA | NA | NA | 4.61 × 102 | 7.51 × 102 |
| 3/vegetable (N = 12) | NA | NA | NA | NA | NA | NA | NA | NA | 6.85 × 101 | 1.46 × 102 |
MPN values shown in italics are above the standard safe water values, for use in recreational and agricultural activities
NA not applicable
ND not determined
aMPN (most probable number of thermotolerant coliforms)/100 ml in water samples
bMPN (most probable number of thermotolerant coliforms)/g in vegetable and soil samples