| Groundwater vulnerability models | Parameters |
| DRASTIC Models | Depth of table |
|
| Net recharge |
|
| Aquifer media |
|
| Soil media |
|
| Topography |
|
| Impact of vadose zone |
|
| Hydraulic conductivity |
| GOD Models | Groundwater confinement |
|
| Overlaying strata |
|
| Depth of water |
| Point sources (Anthropogenic activities) | Dumpsites |
|
| Petrol station |
|
| Auto mobile shops |
|
| Depot |
|
| Industrial effluent |
|
| Septic tanks |
|
| Pit latrines |