| Average with standard error values of physico-chemical parameters at Sarkhej Lake (2013-14) |
W.H.O. standards for drinking water
(Annual Max.) in 1998 |
| Sr. No. |
Parameters |
Year 2013-14 |
| Monsoon |
Winter |
Summer |
| 1 |
Temperature (°C) |
20 ± 1.63 |
17 ± 0.74 |
31± 0.87 |
30-32 |
| 2 |
Electrical conductivity (Ω/cm) |
4.89 ± 0.45 |
3.13 ± 0.47 |
3.48 ± 0.69 |
500 |
| 3 |
Turbidity (NTU) |
18 ± 0.33 |
11 ± 0.16 |
14 ± 0.15 |
5 |
| 4 |
Total Dissolve Solid (mg/L) |
1842 ± 79.14 |
1489 ± 0.42 |
1584 ± 57.63 |
259-500 |
| 5 |
pH |
8.7 ± 0.07 |
7.5 ± 0.13 |
8.6 ± 0.42 |
6.5-8.5 |
| 6 |
Alkalinity (mg/L) |
198 ± 7.32 |
179 ± 3.8 |
223 ± 3.42 |
100 |
| 7 |
Total Hardness (mg/L) |
266 ± 3.88 |
246 ± 7.64 |
320 ± 7.13 |
200 |
| 8 |
Calcium (mg/L) |
43 ± 1.36 |
54 ± 6.47 |
84 ± 3.47 |
75 |
| 9 |
Magnesium (mg/L) |
31 ± 1.65 |
38 ± 5.69 |
37 ± 0.93 |
150 |
| 10 |
Dissolved Oxygen (mg/L) |
3.36 ± 0.84 |
5.17 ± .39 |
3.54 ± 0.47 |
7.5 |
| 11 |
Chloride (mg/L) |
49 ± 0.69 |
79 ± 5.47 |
76 ± 4.13 |
200 |
| 12 |
Sodium (mg/L) |
59 ± 0.69 |
40 ± 3.23 |
48 ± 2.52 |
200 |
| 13 |
Nitrate (mg/L) |
8.22 ± 0.72 |
9.01 ± 0.53 |
7.78 ± 0.84 |
11 |
| 14 |
Phosphate(mg/L) |
0.77 ± 0.15 |
0.48 ± 0.38 |
0.27 ± 0.23 |
0.5 |
| 15 |
Biochemical Oxygen Demand (mg/L) |
1.21 ± 0.24 |
1.80 ± 0.98 |
1.34 ± 0.77 |
6.9 |
