Parameter | Unit | S1 | S2 | S3 | WHO standards |
Physical analysis | |||||
Odour | Nil | Nil | Nil | - | |
Colour | Hazen | 70 | 70 | 70 | - |
pH value | 6.5 | 6.5 | 6.5 | 6.5 - 9.0 | |
Conductivity | µs/cm2 | 2000 | 2000 | 2200 | 1000 |
Chemical analysis | |||||
Acidity | mg/L CaCO3 | 250 | 250 | 250 | - |
Alkalinity | mg/L CaCO3 | 275 | 270 | 250 | 30 - 500 |
Total solids | mg/L | 12 | 10 | 13 | |
Dissolved solids | mg/L | 5 | 4 | 6 | 500 |
Suspended solids | mg/L | 7 | 6 | 7 | - |
Calcium | mg/L | 8.81 | 8 | 8.81 | 75 |
Magnesium | mg/L | 0.51 | 0.49 | 0.51 | Not greater than 30 |
Total hardness | mg/L CaCO3 | 9.32 | 8.49 | 9.32 | 100 - 200 |
Sodium | mg/L | 70 | 55 | 80 | 200 |
Potassium | mg/L | 95 | 100 | 90 | 12 |
Iron | mg/L | 0.001 | 0.001 | 0.1 | 0.3 |
Manganese | mg/L | 1.53 | 1.18 | 1.47 | 0.1 - 0.5 |
Lead | ppm | 18.9 | 21.7 | 39.7 | 0.01 |
Chloride | mg/L | 354.6 | 351 | 343.9 | 250 |
Sulphate | mg/L | 245.8 | 156.5 | 112.1 | 250 |
Nitrate | mg/L | 0.04 | 0.03 | 0.03 | 50 |
Phosphate | mg/L | 5 | 7.21 | 3.92 | - |
COD | mg/L | 184 | 186 | 172 | - |
DO | mg/L | 0.71 | 0.5 | 0.2 | - |
BOD | mg/L | 184.71 | 186.5 | 172 | - |
Microbial analysis | |||||
E-Coli/100ml | per 100 mL | Nil | Nil | Nil | Nil |
Coliform | per 100 mL | Nil | 3 | 2 | Nil |
Total plate count @35˚C after 24 hours | 42 | 78 | 62 | Nil |