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Table 1.

Aquifer classification system (after Parsons, 1995).

Aquifer
system
classification
Coverage of country (%)General location
Major aquifers 18 Primary aquifer systems along the coast
Dolomitic systems in parts of Gauteng, Mpumalanga, the Northern Cape and North West Provinces
Rocks of the Table Mountain Group bordering the Cape coast
Parts of the Karoo Supergroup
Cities and towns receiving water from major aquifer systems are Pretoria, Mmabatho, Atlantis, St. Francis Bay and Beaufort West 
Minor aquifers 67 Minor aquifers occur widely across South Africa with variable borehole yield and water quality. They supply many smaller settlements, e.g. Nylstroom, Williston, Carnarvon, Calvinia, Kenhardt and Richmond 
Poor aquifers 15 Poor aquifers occur mainly in the dry northern and western parts of the country. The generally low borehole yields of poorer quality are, however, still of critical importance to small rural communities 
Aquifer
system
classification
Coverage of country (%)General location
Major aquifers 18 Primary aquifer systems along the coast
Dolomitic systems in parts of Gauteng, Mpumalanga, the Northern Cape and North West Provinces
Rocks of the Table Mountain Group bordering the Cape coast
Parts of the Karoo Supergroup
Cities and towns receiving water from major aquifer systems are Pretoria, Mmabatho, Atlantis, St. Francis Bay and Beaufort West 
Minor aquifers 67 Minor aquifers occur widely across South Africa with variable borehole yield and water quality. They supply many smaller settlements, e.g. Nylstroom, Williston, Carnarvon, Calvinia, Kenhardt and Richmond 
Poor aquifers 15 Poor aquifers occur mainly in the dry northern and western parts of the country. The generally low borehole yields of poorer quality are, however, still of critical importance to small rural communities 
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