Carbonate-rock aquifers are most extensive in the eastern United States. Most of the carbonate-rock aquifers consist of limestone, and their water-yielding properties vary widely.
To learn more, visit the Carbonate-Rock Aquifers webpage for an overview, or access more extensive information from the Ground Water Atlas of the United States (USGS Hydrologic Atlas 730) by clicking on an individual region/chapter below.
Basin and Range carbonate-rock aquifers (southwestern U.S.)
![Map showing Basin and Range aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_basranaa%20%281%29.gif?itok=KqoKaQHm)
- California, and Nevada (Chapter B)
- Arizona, Colorado, New Mexico, and Utah (Chapter C)
Roswell Basin aquifer system (New Mexico)
![Map showing the Roswell Basin aquifer system](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_roswellb.gif?itok=SBHHG0Qj)
- Arizona, Colorado, New Mexico, and Utah (Chapter C)
Blaine aquifer (Oklahoma and Texas)
![Map showing the Blaine aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_blaine.gif?itok=cS7KmN9j)
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Oklahoma and Texas (Chapter E)
Arbuckle-Simpson aquifer (Oklahoma)
![Map showing extent of the Arbuckle-Simpson aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_arbsim.gif?itok=RbP4bztV)
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Oklahoma and Texas (Chapter E)
Silurian-Devonian aquifers (northern Midwest)
![Map showing the Silurian-Devonian aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_silurian.gif?itok=mkkNn1mW)
- Illinois, Indiana, Kentucky, Ohio, and Tennessee (Chapter K)
- Iowa, Michigan, Minnesota, and Wisconsin (Chapter J)
Ozark Plateaus aquifer system (Missouri)
![Map showing the Ozark Plateaus aquifer system](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_ozarkas.gif?itok=KHAzFDmX)
- Kansas, Missouri, and Nebraska (Chapter D)
- Arkansas, Louisiana, and Mississippi (Chapter F)
- Oklahoma and Texas (Chapter E)
Ordovician aquifers (Tennessee and Kentucky)
![Map showing Ordovician aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_ordov.gif?itok=F7Yrh3-F)
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Illinois, Indiana, Kentucky, Ohio, and Tennessee (Chapter K)
Upper carbonate aquifer (Minnesota and Iowa)
![Map showing Upper carbonate aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_upcarb.gif?itok=AQRlQm-8)
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Iowa, Michigan, Minnesota, and Wisconsin (Chapter J)
Floridan aquifer system
![Map showing the Floridan aquifer system](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_floridan.gif?itok=Naw5qDtY)
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Alabama, Florida, Georgia, and South Carolina (Chapter G)
Biscayne aquifer (Florida)
![Map of the Biscayne aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_biscayne.gif?itok=AmOuGskT)
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Alabama, Florida, Georgia, and South Carolina (Chapter G)
New York and New England carbonate-rock aquifers
![Map showing the New York and New England carbonate-rock aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_nycarbon.gif?itok=KnFQt6rh)
Piedmont and Blue Ridge carbonate-rock aquifers (eastern U.S.)
![Map showing the Piedmont and Blue Ridge carbonate-rock aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_carbon.gif?itok=mESHlvtH)
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Delaware, Maryland, New Jersey, North Carolina, Pennsylvania, Virginia, and West Virginia (Chapter L)
Castle Hayne-Aquia aquifer (North Carolina)
![Map showing the Castle-Hayne aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_chaq.gif?itok=k542AtNZ)
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Delaware, Maryland, New Jersey, North Carolina, Pennsylvania, Virginia, and West Virginia (Chapter L)
North Coast Limestone aquifer system (Puerto Rico)
![Map showing the North Coast Limestone aquifer system (Puerto RIco)](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_nclas.gif?itok=O6xKUNSq)
Kingshill aquifer (Virgin Islands)
![Map showing the Kingshill aquifer (St. Croix, U.S. Virgin Islands)](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_kings.gif?itok=yL7eNZfP)
Below are other web pages related to principal aquifers.
Carbonate-rock aquifers
Below are publications associated with principal aquifers.
Ground Water Atlas of the United States
Carbonate-rock aquifers are most extensive in the eastern United States. Most of the carbonate-rock aquifers consist of limestone, and their water-yielding properties vary widely.
To learn more, visit the Carbonate-Rock Aquifers webpage for an overview, or access more extensive information from the Ground Water Atlas of the United States (USGS Hydrologic Atlas 730) by clicking on an individual region/chapter below.
Basin and Range carbonate-rock aquifers (southwestern U.S.)
![Map showing Basin and Range aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_basranaa%20%281%29.gif?itok=KqoKaQHm)
- California, and Nevada (Chapter B)
- Arizona, Colorado, New Mexico, and Utah (Chapter C)
Roswell Basin aquifer system (New Mexico)
![Map showing the Roswell Basin aquifer system](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_roswellb.gif?itok=SBHHG0Qj)
- Arizona, Colorado, New Mexico, and Utah (Chapter C)
Blaine aquifer (Oklahoma and Texas)
![Map showing the Blaine aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_blaine.gif?itok=cS7KmN9j)
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Oklahoma and Texas (Chapter E)
Arbuckle-Simpson aquifer (Oklahoma)
![Map showing extent of the Arbuckle-Simpson aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_arbsim.gif?itok=RbP4bztV)
-
Oklahoma and Texas (Chapter E)
Silurian-Devonian aquifers (northern Midwest)
![Map showing the Silurian-Devonian aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_silurian.gif?itok=mkkNn1mW)
- Illinois, Indiana, Kentucky, Ohio, and Tennessee (Chapter K)
- Iowa, Michigan, Minnesota, and Wisconsin (Chapter J)
Ozark Plateaus aquifer system (Missouri)
![Map showing the Ozark Plateaus aquifer system](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_ozarkas.gif?itok=KHAzFDmX)
- Kansas, Missouri, and Nebraska (Chapter D)
- Arkansas, Louisiana, and Mississippi (Chapter F)
- Oklahoma and Texas (Chapter E)
Ordovician aquifers (Tennessee and Kentucky)
![Map showing Ordovician aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_ordov.gif?itok=F7Yrh3-F)
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Illinois, Indiana, Kentucky, Ohio, and Tennessee (Chapter K)
Upper carbonate aquifer (Minnesota and Iowa)
![Map showing Upper carbonate aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_upcarb.gif?itok=AQRlQm-8)
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Iowa, Michigan, Minnesota, and Wisconsin (Chapter J)
Floridan aquifer system
![Map showing the Floridan aquifer system](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_floridan.gif?itok=Naw5qDtY)
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Alabama, Florida, Georgia, and South Carolina (Chapter G)
Biscayne aquifer (Florida)
![Map of the Biscayne aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_biscayne.gif?itok=AmOuGskT)
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Alabama, Florida, Georgia, and South Carolina (Chapter G)
New York and New England carbonate-rock aquifers
![Map showing the New York and New England carbonate-rock aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_nycarbon.gif?itok=KnFQt6rh)
Piedmont and Blue Ridge carbonate-rock aquifers (eastern U.S.)
![Map showing the Piedmont and Blue Ridge carbonate-rock aquifers](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_carbon.gif?itok=mESHlvtH)
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Delaware, Maryland, New Jersey, North Carolina, Pennsylvania, Virginia, and West Virginia (Chapter L)
Castle Hayne-Aquia aquifer (North Carolina)
![Map showing the Castle-Hayne aquifer](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_chaq.gif?itok=k542AtNZ)
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Delaware, Maryland, New Jersey, North Carolina, Pennsylvania, Virginia, and West Virginia (Chapter L)
North Coast Limestone aquifer system (Puerto Rico)
![Map showing the North Coast Limestone aquifer system (Puerto RIco)](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_nclas.gif?itok=O6xKUNSq)
Kingshill aquifer (Virgin Islands)
![Map showing the Kingshill aquifer (St. Croix, U.S. Virgin Islands)](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/ext_kings.gif?itok=yL7eNZfP)
Below are other web pages related to principal aquifers.
Carbonate-rock aquifers
Below are publications associated with principal aquifers.