USGS National Aquifers
Map
Limit:
Items
| uri | fid | rock_name | sameas | gis_metadata | gis_metadata2 | link | aq_code | rock_type | valid_states | gis_data | gis_data2 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| https://geoconnex.us/ref/nat_aq/N100BSNRGB | 1 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 101 | 100 | Arizona, California, Idaho,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N100CACSTL | 2 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 103 | 100 | California | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N100CMBPLB | 3 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 116 | 100 | Idaho, Oregon, Washington | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N100HGHPLN | 4 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 107 | 100 | Colorado, Kansas, Nebraska, New... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N100MSRVVL | 5 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 109 | 100 | Arkansas, Illinois, Kentucky,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N100PCFNWB | 6 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 104 | 100 | California, Idaho, Nevada,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N100PCFNWV | 7 | Igneous and metamorphic-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aquif... | 610 | 600 | California, Idaho, Montana,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N100PCSRVR | 8 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 108 | 100 | New Mexico, Texas | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N100SYMOUR | 9 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 110 | 100 | Texas | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N100WLMLWD | 10 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 115 | 100 | Oregon, Washington | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300ADAVMS | 11 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 307 | 300 | Oklahoma | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300CNRLOK | 12 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 306 | 300 | Oklahoma | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300COPLTS | 13 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 301 | 300 | Arizona, Colorado, New Mexico,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300ERLMZC | 14 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 308 | 300 | Connecticut, Maryland,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300JCBSVL | 15 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 313 | 300 | Michigan, Wisconsin | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300LCRTCS | 16 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 304 | 300 | Iowa, Kansas, Minnesota,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300LTRTRY | 17 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 314 | 300 | Montana, North Dakota, South... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300MRSHLL | 18 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 311 | 300 | Michigan | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300NYSDSN | 19 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 309 | 300 | New York | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300PNSLVN | 20 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 310 | 300 | Alabama, Georgia, Illinois,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300RSHSPG | 21 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 305 | 300 | Oklahoma | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N300UPCTCS | 22 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 315 | 300 | Montana, North Dakota, South... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400ABKSMP | 23 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 407 | 400 | Oklahoma | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400BISCYN | 24 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 414 | 400 | Florida | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400BLAINE | 25 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 406 | 400 | Oklahoma, Texas | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400BSNRGC | 26 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 401 | 400 | Arizona, California, Idaho, Nevada, Utah | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400CSLHYN | 27 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 418 | 400 | North Carolina | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400KNGSHL | 28 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 420 | 400 | Virgin Islands | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400NYNECB | 29 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 416 | 400 | Connecticut, Maine,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400ORDVCN | 30 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 411 | 400 | Kentucky, Tennessee | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400PDMBRC | 31 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 417 | 400 | Maryland, New Jersey, North... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400PDMBRX | 32 | Igneous and metamorphic-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 611 | 600 | Alabama, Delaware, District of... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400SLRDVN | 33 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 410 | 400 | Illinois, Indiana, Iowa,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N400UPCRBN | 34 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 412 | 400 | Iowa, Minnesota | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N500MSSPPI | 35 | Sandstone and carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 503 | 500 | Alabama, Illinois, Indiana,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N500PLOZOC | 36 | Sandstone and carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 504 | 500 | Minnesota, Montana, North... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N500VLYRDG | 37 | Sandstone and carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 505 | 500 | Alabama, Georgia, Maryland, New... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N600CMBPLV | 38 | Igneous and metamorphic-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 607 | 600 | Idaho, Oregon, Washington | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N600HIVLCC | 39 | Igneous and metamorphic-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 608 | 600 | Hawaii | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N600SKRVPB | 40 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 117 | 100 | Idaho, Oregon | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N600SKRVPV | 41 | Igneous and metamorphic-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 606 | 600 | Idaho, Oregon | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N600SRNVDV | 42 | Igneous and metamorphic-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 601 | 600 | Nevada | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/N9999OTHER | 43 | None | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 999 | 999 | All | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100CNRLVL | 44 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 106 | 100 | California | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100CSLLWD | 45 | Semiconsolidated sand aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 201 | 200 | Alabama, Florida, Louisiana,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100MSEMBM | 46 | Semiconsolidated sand aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 203 | 200 | Alabama, Arkansas, Illinois,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100NATLCP | 47 | Semiconsolidated sand aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 205 | 200 | Delaware, District of Columbia,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100NRMTIB | 48 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 105 | 100 | Idaho, Montana, Washington, Wyoming | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100PGTSND | 49 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 112 | 100 | Washington | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100RIOGRD | 50 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 102 | 100 | Colorado, New Mexico, Texas | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100SECSLP | 51 | Semiconsolidated sand aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 204 | 200 | Alabama, Georgia, Mississippi,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100SURFCL | 52 | Unconsolidated sand and gravel aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 111 | 100 | Alabama, Florida, Georgia, ... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S100TXCLUP | 53 | Semiconsolidated sand aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 202 | 200 | Louisiana, Texas | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S300CAMORD | 54 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 312 | 300 | Illinois, Iowa, Michigan,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S300DNVRBS | 55 | Sandstone aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 302 | 300 | Colorado | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S400FLORDN | 56 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 413 | 400 | Alabama, Florida, Georgia,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S400OZRKPL | 57 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 405 | 400 | Arkansas, Illinois, Kansas,... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S400RSWLBS | 58 | Carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 402 | 400 | New Mexico | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |
| https://geoconnex.us/ref/nat_aq/S500EDRTRN | 59 | Sandstone and carbonate-rock aquifers | https://geoconnex.us/ref/princip... | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... | http://water.usgs.gov/ogw/aquife... | 501 | 500 | Arkansas, Oklahoma, Texas | https://water.usgs.gov/ogw/aq_ex... | https://water.usgs.gov/ogw/aq_ex... |