Industrial discharges, urban activities, agriculture, groundwater pumpage, and disposal of waste all can affect groundwater quality. Contaminants can be human-induced, as from leaking fuel tanks or toxic chemical spills.s.
condiments May reach groundwater from activities on land surface such as releases or spills from stored industrial what is from source below the land surface but above the water table, such as septic systems or leaking underground petroleum storage systems from structures beneath the water table
