Municipallandfill
Accidentalspillage
Leachate
Leakingseptictank
Agriculturalleachate(pesticides,fertilizers)
De-icingchemicals,oils
Water table Aquifer
Industriallandfillleachate
Abandonedoil well
Leakingpetroleumtank
Brine leakagefrom rupturedwell casing
Fig. 5.16
Typical anthropogenic mechanisms of groundwater contamination.