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Groundwater pollution
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Groundwater pollution occurs when pollutants are released to the ground and make their way into groundwater. This type of water pollution can also occur naturally due to the presence of a minor and unwanted constituent, contaminant, or impurity in the groundwater, in which case it is more likely referred to as contamination rather than pollution. Groundwater pollution can occur from on-site sanitation systems, landfill leachate, effluent from wastewater treatment plants, leaking sewers, petrol filling stations, hydraulic fracturing (fracking) or from over application of fertilizers in agriculture. Pollution can also occur from naturally occurring contaminants, such as arsenic or fluoride. Using polluted groundwater causes hazards to public health through poisoning or the spread of disease.
Groundwater pollution in Lusaka, Zambia, where the pit latrine in the background is polluting the shallow well in the foreground with pathogens and ni
Groundwater pollution in Lusaka, Zambia, where the pit latrine in the background is polluting the shallow well in the foreground with pathogens and nitrate
A traditional housing compound near Herat, Afghanistan, where a shallow water supply well (foreground) is in close proximity to the pit latrine (behin
A traditional housing compound near Herat, Afghanistan, where a shallow water supply well (foreground) is in close proximity to the pit latrine (behind the white greenhouse) leading to contamination of the groundwater
Poor management practices in manure spreading can introduce both pathogens and nutrients (nitrate) in the groundwater system.
Poor management practices in manure spreading can introduce both pathogens and nutrients (nitrate) in the groundwater system.
Schematic showing that there is a lower risk of groundwater pollution with greater depth of the water well
Schematic showing that there is a lower risk of groundwater pollution with greater depth of the water well
Tailings
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In mining, tailings or tails are the materials left over after the process of separating the valuable fraction from the uneconomic fraction (gangue) of an ore. Tailings are different from overburden, which is the waste rock or other material that overlies an ore or mineral body and is displaced during mining without being processed.
Yellow boy in a stream receiving acid mine drainage from surface coal mining
Phosphogypsum stack located near Fort Meade, Florida. These contain the waste byproducts of the phosphate fertilizer industry.
Phosphogypsum stack located near Fort Meade, Florida. These contain the waste byproducts of the phosphate fertilizer industry.
Red mud near Stade (Germany)
Red mud near Stade (Germany)
Bauxite, an aluminium ore (Hérault department, France). The reddish colour is due to iron oxides that make up the main part of the red mud.
Bauxite, an aluminium ore (Hérault department, France). The reddish colour is due to iron oxides that make up the main part of the red mud.