Table 3 The permissible limits WHO and results of the physio-chemical and environmental parameters with aerial distribution of wells%
Parameter | WHO desirable limit (mg/l) (a) | WHO allowable limit (mg/l) (b) | Undesirable limit (mg/l) (c) | Min. | Max. | Avg. | Med. | %Wells according permissible limits for Each parameter | ||
|---|---|---|---|---|---|---|---|---|---|---|
(a) | (b) | ( c) | ||||||||
EC | 1000 (mmhos) | 1500 (mmhos) | > 1500 (mmhos) | 0.34 | 9.00 | 2.03 | 0.98 | 100.0 | 0 | 0 |
TDS | 500 | 1000 | > 1000 | 263.0 | 5765 | 1276.69 | 646.5 | 43.79 | 29.16 | 27.05 |
pH | 6.5–8.5 | 8.5 | > 8.5 | 7.10 | 8.50 | 7.78 | 7.90 | 81.25 | 18.75 | 0 |
K | 10 | 12 | > 12 | 4.00 | 46.0 | 10.55 | 8.00 | 64.60 | 20.8 | 14.6 |
Na | 200 | 200 | > 200 | 31.00 | 1242 | 270.18 | 161.0 | 68.73 | 0 | 31.27 |
Ca | 75 | 75 | > 200 | 12.00 | 714.0 | 118.82 | 33.00 | 70.80 | 12.5 | 16.7 |
Mg | 50 | 50 | > 150 | 11.00 | 243.0 | 43.47 | 23.00 | 85.45 | 6.25 | 8.3 |
HCO3 | 250 | 500 | > 500 | 85.00 | 500.0 | 246.06 | 219.0 | 66.70 | 33.3 | 0 |
Cl | 250 | 250 | > 250 | 18.00 | 2662 | 422.71 | 145.0 | 72.90 | 22.9 | 4.2 |
SO4 | 250 | 250 | > 250 | 12.00 | 1108 | 184.1 | 52.00 | 79.20 | 0 | 20.8 |
Fe | 0.3 | 1 | > 0.3 | 0.00 | 1.09 | 0.13 | 0.02 | 86.40 | 13.6 | 0 |
Mn | 0.05 | 0.1 | > 0.1 | 0.01 | 0.78 | 0.21 | 0.10 | 27.30 | 22.7 | 50 |
Cd | 0.005 | 0.1 | > 0.1 | 0.00 | 0.02 | 0.00 | 0.00 | 77.40 | 9 | 13.6 |
Zn | 5 | 5 | > 5 | 0.00 | 0.73 | 0.16 | 0.11 | 100.0 | 0 | 0 |
Pb | 0.01 | 0.01 | > 0.05 | 0.00 | 0.64 | 0.06 | 0.03 | 27.20 | 36.4 | 36.4 |
Cr | 0.05 | 0.05 | > 0.05 | 0.00 | 0.04 | 0.01 | 0.01 | 100.0 | 0 | 0 |
Co | 0.05 | 0.05 | > 0.05 | 0.01 | 0.02 | 0.01 | 0.01 | 100.0 | 0 | 0 |
Al | 0.2 | 0.2 | > 0.2 | 0.01 | 0.37 | 0.05 | 0.01 | 96.0 | 0 | 4 |