Table 5: Physiochemical parameters of the borehole at the control station.
|
Year |
pH |
Ec (µS/cm) |
Sal (‰) |
Temp (℃) |
DO (mg/l) |
|
Sep-19 |
7.42 |
7.3 |
0 |
28.0 |
0.62 |
|
Oct-19 |
7.68 |
7.6 |
0 |
27.0 |
0.73 |
|
Nov-19 |
7.73 |
74.0 |
0 |
28.0 |
0.94 |
|
Dec-19 |
7.23 |
65.0 |
0 |
28.4 |
0.68 |
|
Range |
7.23-7.73 |
7.3-74 |
0 |
27-28.4 |
0.62-0.94 |
|
WHO [13] |
7-8.5 |
400-1500 |
- |
- |
5.0 |
|
USEPA [21] |
6.5-8.5 |
- |
0 |
Ambient/cool |
4.0 |