Table 1:
Mean values for the water quality parameters of wells located close to waste dumpsite in dry season.
| S/N | Parameters | Distance from dumpsite (cm) | Standards | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||
| 50 | 100 | 150 | 200 | WHO | FEPA | EUROPE | USA | |||
| 1. | pH | Mean | 7.84 | 7.53 | 8.06 | 6.91 | 6.5–8.5 | 6.5–8.5 | 6.5–8.5 | 6.5–8.5 |
| SE | 0.75 | 0.49 | 0.62 | 0.51 | ||||||
| 2. | Turbidity (NTU) | Mean | 3.33 | 6.67 | 12.11 | 42.12 | 5.0 | 1.0 | 1.5 | 5.0 |
| SE | 0.33 | 0.17 | 1.15 | 5.12 | ||||||
| 3 | Conductivity (μS/cm) | Mean | 541.67 | 703.33 | 799 | 421 | - | - | - | - |
| SE | 42.06 | 20.51 | 96 | 10 | ||||||
| 4. | Temperature (°C) | Mean | 30.0 | 30.33 | 30 | 30.33 | - | - | - | - |
| SE | 0.58 | 0.33 | 0.58 | 0.33 | ||||||
| 5. | TDS (mg/L) | Mean | 352.08 | 457.17 | 389.35 | 273.43 | 1000 | 500 | - | - |
| SE | 27.34 | 13.32 | 78.76 | 6.47 | ||||||
| 6. | TSS (mg/L) | Mean | 1.33 | 6.33 | 9.33 | 69.33 | - | >10 | - | - |
| SE | 0.88 | 0.36 | 0.33 | 0.85 | ||||||
| 7. | TS (mg/L) | Mean | 353.42 | 463.50 | 528.68 | 342.77 | 1000 | - | - | - |
| SE | 27.61 | 18.37 | 71.58 | 70.87 | ||||||
| 8. | PO43− (mg/L) | Mean | 0.23 | 0.22 | 0.19 | 0.02 | - | >50 | - | - |
| SE | 0.10 | 0.12 | 0.10 | 0.01 | ||||||
| 9. | SO42− (mg/L) | Mean | 10.87 | 23.85 | 23.51 | 4.30 | 400 | 500 | 500 | 5.0 |
| SE | 0.36 | 0.91 | 0.46 | 0.13 | ||||||
| 10. | NO3− (mg/L) | Mean | 7.00 | 17.88 | 9.03 | 19.28 | 10 | 10 | 10 | 10 |
| SE | 2.50 | 8.91 | 1.43 | 11.96 | ||||||
| 11. | Cu (mg/L) | Mean | 0.09 | 0.07 | 0.09 | 0.12 | 1 | 0.1 | 1.0 | - |
| SE | 0.01 | 0.04 | 0.01 | 0.01 | ||||||
| 12. | Pb ((mg/L) | Mean | 0.20 | 0.32 | 0.14 | 0.16 | 0.05 | 0.05 | - | - |
| SE | 0.09 | 0.09 | 0.01 | 0.09 | ||||||
| 13. | Cd (mg/L) | Mean | 0.78 | 0.30 | 0.32 | 0.30 | 0.005 | 0.01 | - | - |
| SE | 0.03 | 0.06 | 0.05 | 0.03 | ||||||
| 14. | BOD (mg/L) | Mean | 3.59 | 1.20 | 2.14 | 2.55 | - | - | - | - |
| SE | 1.50 | 0.27 | 0.77 | 1.23 | ||||||
| 15. | COD (mg/L) | Mean | 47.36 | 29.45 | 36.73 | 43.59 | - | - | - | - |
| SE | 18.07 | 12.51 | 14.31 | 19.67 | ||||||
| 16. | DO (mg/L) | Mean | 5.03 | 3.00 | 3.53 | 4.07 | - | 7.5 | - | - |
| SE | 0.53 | 0.58 | 0.76 | 0.30 | ||||||
| 17. | FC (CFU/100ml) | Mean | 34.67 | 32.67 | 21.33 | 7.67 | 0 | 0 | 0 | 0 |
| SE | 2.03 | 7.84 | 3.76 | 1.86 | ||||||
| 18. | TC (CFU/100ml | Mean | 67.00 | 60.33 | 37.67 | 16.33 | 0 | 0 | 0 | 0 |
| SE | 13.32 | 15.50 | 10.27 | 3.28 | ||||||
S/N = serial number, SE = standard error of mean, WHO = World Health Organization, FEPA Federal Environmental Protection Agency (Nigeria), USA = United States of America.