The CIA World Factbook Edition 2021 Geography
Major aquifers In 5 editions of 36.
Major aquifers was published in 5 editions of the CIA World Factbook, from 2021 to 2025. The 2021 edition carries it in 53 entries, in its Geography section. Every entry is shown as that edition published it.
- entries in the 2021 edition
- 53
- the first edition with it
- 2021
- the latest edition with it
- 2025
Published as “Major aquifers” (2021 to 2025).
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Entries with Major aquifers in each edition
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World
1 entryWorld
Published as “Major aquifers”
- summary statement:
- aquifers are underground layers of water-bearing permeable rock formations;
- they include alluvial formations such as unconsolidated sand and gravel aquifers, sedimentary rock formations of sandstone and karst (carbonate rocks such as limestone) aquifers, as well as volcanic aquifers, and basement aquifers (igneous and metamorphic rocks that underlie sedimentary and volcanic rock sequences);
- groundwater from aquifers can be extracted using a water well;
- The World Factbook lists 37 major aquifers across 52 countries;
- of these, 13 are in Africa, 10 in Asia, 5 in North America, 3 in South America, 4 in Europe, and 2 in Australia;
- although aquifers can vary in size, the major aquifers listed in The Factbook contain the bulk of the stored volume of groundwater;
- the fresh water held in these aquifers represents more than 30% of the World's fresh water;
- in the US, groundwater is primarily used for irrigation and globally, 70% of groundwater withdrawn is used for agriculture;
- groundwater also supplies almost half of all drinking water worldwide
Published as “Major aquifers”
- summary statement:
- aquifers are underground layers of water-bearing permeable rock formations;
- they include alluvial formations such as unconsolidated sand and gravel aquifers, sedimentary rock formations of sandstone and karst (carbonate rocks such as limestone) aquifers, as well as volcanic aquifers, and basement aquifers (igneous and metamorphic rocks that underlie sedimentary and volcanic rock sequences);
- groundwater from aquifers can be extracted using a water well;
- The World Factbook lists 37 major aquifers across 52 countries;
- of these, 13 are in Africa, 10 in Asia, 5 in North America, 3 in South America, 4 in Europe, and 2 in Australia;
- although aquifers can vary in size, the major aquifers listed in The Factbook contain the bulk of the stored volume of groundwater;
- the fresh water held in these aquifers represents more than 30% of the World's fresh water;
- in the US, groundwater is primarily used for irrigation and globally, 70% of groundwater withdrawn is used for agriculture;
- groundwater also supplies almost half of all drinking water worldwide
Africa
27 entriesAlgeria
Published as “Major aquifers”
- Lullemeden-Irhazer Aquifer System,
- Murzuk-Djado Basin,
- North Western Sahara Aquifer,
- Taoudeni-Tanezrouft Basin
Published as “Major aquifers”
- Lullemeden-Irhazer Aquifer System,
- Murzuk-Djado Basin,
- North Western Sahara Aquifer,
- Taoudeni-Tanezrouft Basin
Angola
Published as “Major aquifers”
Congo Basin, Upper Kalahari-Cuvelai-Upper Zambezi Basin
Published as “Major aquifers”
Congo Basin, Upper Kalahari-Cuvelai-Upper Zambezi Basin
Botswana
Published as “Major aquifers”
Lower Kalahari-Stampriet Basin, Upper Kalahari-Cuvelai-Upper Zambezi Basin
Published as “Major aquifers”
Lower Kalahari-Stampriet Basin, Upper Kalahari-Cuvelai-Upper Zambezi Basin
Cameroon
Published as “Major aquifers”
Lake Chad Basin
Published as “Major aquifers”
Lake Chad Basin
Central African Republic
Published as “Major aquifers”
Congo Basin, Lake Chad Basin
Published as “Major aquifers”
Congo Basin, Lake Chad Basin
Chad
Published as “Major aquifers”
Lake Chad Basin, Nubian Aquifer System
Published as “Major aquifers”
Lake Chad Basin, Nubian Aquifer System
Congo, Democratic Republic of the now Democratic Republic of the Congo
Published as “Major aquifers”
Congo Basin
Published as “Major aquifers”
Congo Basin
Congo, Republic of the now Republic of the Congo
Published as “Major aquifers”
Congo Basin
Published as “Major aquifers”
Congo Basin
Egypt
Published as “Major aquifers”
Nubian Aquifer System
Published as “Major aquifers”
Nubian Aquifer System
Ethiopia
Published as “Major aquifers”
Ogaden-Juba Basin, Sudd Basin (Umm Ruwaba Aquifer)
Published as “Major aquifers”
Ogaden-Juba Basin, Sudd Basin (Umm Ruwaba Aquifer)
Gambia, The now The Gambia
Published as “Major aquifers”
Senegalo-Mauritanian Basin
Published as “Major aquifers”
Senegalo-Mauritanian Basin
Guinea-Bissau
Published as “Major aquifers”
Senegalo-Mauritanian Basin
Published as “Major aquifers”
Senegalo-Mauritanian Basin
Kenya
Published as “Major aquifers”
Ogaden-Juba Basin
Published as “Major aquifers”
Ogaden-Juba Basin
Libya
Published as “Major aquifers”
- Nubian Aquifer System,
- North Western Sahara Aquifer System,
- Murzuk-Djado Basin
Published as “Major aquifers”
- Nubian Aquifer System,
- North Western Sahara Aquifer System,
- Murzuk-Djado Basin
Mali
Published as “Major aquifers”
Lullemeden-Irhazer Basin, Taodeni-Tanezrouft Basin
Published as “Major aquifers”
Lullemeden-Irhazer Basin, Taodeni-Tanezrouft Basin
Mauritania
Published as “Major aquifers”
Senegalo-Mauritanian Basin, Taodeni-Tanzerouft Basin
Published as “Major aquifers”
Senegalo-Mauritanian Basin, Taodeni-Tanzerouft Basin
Namibia
Published as “Major aquifers”
Lower Kalahari-Stampriet Basin, Upper Kalahari-Cuvelai-Upper Zambezi Basin
Published as “Major aquifers”
Lower Kalahari-Stampriet Basin, Upper Kalahari-Cuvelai-Upper Zambezi Basin
Niger
Published as “Major aquifers”
- Lake Chad Basin,
- Lullemeden-Irhazer Basin,
- Murzuk-Djado Basin
Published as “Major aquifers”
- Lake Chad Basin,
- Lullemeden-Irhazer Basin,
- Murzuk-Djado Basin
Nigeria
Published as “Major aquifers”
Lake Chad Basin, Lullemeden-Irhazer Aquifer System
Published as “Major aquifers”
Lake Chad Basin, Lullemeden-Irhazer Aquifer System
Senegal
Published as “Major aquifers”
Senegalo-Mauritanian Basin
Published as “Major aquifers”
Senegalo-Mauritanian Basin
Somalia
Published as “Major aquifers”
Ogaden-Juba Basin
Published as “Major aquifers”
Ogaden-Juba Basin
South Africa
Published as “Major aquifers”
Karoo Basin, Lower Kalahari-Stampriet Basin
Published as “Major aquifers”
Karoo Basin, Lower Kalahari-Stampriet Basin
Sudan
Published as “Major aquifers”
Nubian Aquifer System, Sudd Basin (Umm Ruwaba Aquifer)
Published as “Major aquifers”
Nubian Aquifer System, Sudd Basin (Umm Ruwaba Aquifer)
Tunisia
Published as “Major aquifers”
North Western Sahara Aquifer System
Published as “Major aquifers”
North Western Sahara Aquifer System
Zambia
Published as “Major aquifers”
Upper Kalahari-Cuvelai-Upper Zambezi Basin
Published as “Major aquifers”
Upper Kalahari-Cuvelai-Upper Zambezi Basin
Zimbabwe
Published as “Major aquifers”
Upper Kalahari-Cuvelai-Upper Zambezi Basin
Published as “Major aquifers”
Upper Kalahari-Cuvelai-Upper Zambezi Basin
Asia
6 entriesBangladesh
Published as “Major aquifers”
Indus-Ganges-Brahmaputra Basin
Published as “Major aquifers”
Indus-Ganges-Brahmaputra Basin
China
Published as “Major aquifers”
- North China Aquifer System (Huang Huai Hai Plain),
- Song-Liao Plain,
- Tarim Basin
Published as “Major aquifers”
- North China Aquifer System (Huang Huai Hai Plain),
- Song-Liao Plain,
- Tarim Basin
India
Published as “Major aquifers”
Indus-Ganges-Brahmaputra Basin
Published as “Major aquifers”
Indus-Ganges-Brahmaputra Basin
Nepal
Published as “Major aquifers”
Indus-Ganges-Brahmaputra Basin
Published as “Major aquifers”
Indus-Ganges-Brahmaputra Basin
Russia
Published as “Major aquifers”
- Angara-Lena Basin,
- Pechora Basin,
- North Caucasus Basin,
- East European Aquifer System,
- West Siberian Basin,
- Tunguss Basin,
- Yakut Basin
Published as “Major aquifers”
- Angara-Lena Basin,
- Pechora Basin,
- North Caucasus Basin,
- East European Aquifer System,
- West Siberian Basin,
- Tunguss Basin,
- Yakut Basin
Europe
1 entryMiddle East
7 entriesBahrain
Published as “Major aquifers”
Arabian Aquifer System
Published as “Major aquifers”
Arabian Aquifer System
Iraq
Published as “Major aquifers”
Arabian Aquifer System
Published as “Major aquifers”
Arabian Aquifer System
Jordan
Published as “Major aquifers”
Arabian Aquifer System
Published as “Major aquifers”
Arabian Aquifer System
Kuwait
Published as “Major aquifers”
Arabian Aquifer System
Published as “Major aquifers”
Arabian Aquifer System
Oman
Published as “Major aquifers”
Arabian Aquifer System
Published as “Major aquifers”
Arabian Aquifer System
Qatar
Published as “Major aquifers”
Arabian Aquifer System
Published as “Major aquifers”
Arabian Aquifer System
Saudi Arabia
Published as “Major aquifers”
Arabian Aquifer System
Published as “Major aquifers”
Arabian Aquifer System
North America
3 entriesCanada
Published as “Major aquifers”
Northern Great Plains Aquifer
Published as “Major aquifers”
Northern Great Plains Aquifer
Mexico
Published as “Major aquifers”
Atlantic and Gulf Coastal Plains Aquifer
Published as “Major aquifers”
Atlantic and Gulf Coastal Plains Aquifer
United States
Published as “Major aquifers”
- Northern Great Plains Aquifer,
- Cambrian-Ordovician Aquifer System,
- Californian Central Valley Aquifer System,
- Ogallala Aquifer (High Plains),
- Atlantic and Gulf Coastal Plains Aquifer
Published as “Major aquifers”
- Northern Great Plains Aquifer,
- Cambrian-Ordovician Aquifer System,
- Californian Central Valley Aquifer System,
- Ogallala Aquifer (High Plains),
- Atlantic and Gulf Coastal Plains Aquifer
Oceania
1 entryAustralia
Published as “Major aquifers”
Great Artesian Basin, Canning Basin
Published as “Major aquifers”
Great Artesian Basin, Canning Basin
South America
7 entriesArgentina
Published as “Major aquifers”
Guarani Aquifer System
Published as “Major aquifers”
Guarani Aquifer System
Brazil
Published as “Major aquifers”
- Amazon Basin,
- Guarani Aquifer System,
- Maranhao Basin
Published as “Major aquifers”
- Amazon Basin,
- Guarani Aquifer System,
- Maranhao Basin
Paraguay
Published as “Major aquifers”
Guarani Aquifer System
Published as “Major aquifers”
Guarani Aquifer System
Uruguay
Published as “Major aquifers”
Guarani Aquifer System
Published as “Major aquifers”
Guarani Aquifer System
Cite this page
Central Intelligence Agency. The World Factbook 2021, “Major aquifers”, all entries. Archived by The Factbook, thefactbook.org/fields/major-aquifers/2021.