{
  "N100AKUNCD": "Unconsolidated-deposit aquifers (Alaska).     ValidDate: 2001-08-01",
  "N100ALLUVL": "See note in History.     ValidDate: 2001-08-01",
  "N100BSNRGB": "Basin and Range basin-fill aquifers (southwestern U.S.).     ValidDate: 2001-08-01",
  "N100CACSTL": "California Coastal Basin aquifers.     ValidDate: 2001-08-01",
  "N100CMBPLB": "Columbia Plateau basin-fill aquifers.     ValidDate: 2001-08-01",
  "N100GLCIAL": "Sand and gravel aquifers of alluvial and glacial origin (North of the line of glaciation).     ValidDate: 2001-08-01",
  "N100HGHPLN": "High Plains aquifer.     ValidDate: 2001-08-01",
  "N100MSRVVL": "Mississippi River Valley alluvial aquifer.     ValidDate: 2001-08-01",
  "N100PCFNWB": "Pacific Northwest basin-fill aquifers.     ValidDate: 2001-08-01",
  "N100PCFNWV": "Pacific Northwest basaltic-rock aquifers.     ValidDate: 2001-08-01",
  "N100PCSRVR": "Pecos River Basin alluvial aquifer (Texas and New Mexico).     ValidDate: 2001-08-01",
  "N100SYMOUR": "Seymour aquifer (Texas).     ValidDate: 2001-08-01",
  "N100WLMLWD": "Willamette Lowland basin-fill aquifers (Oregon).     ValidDate: 2001-08-01",
  "N300ADAVMS": "Ada-Vamoosa aquifer (Oklahoma).     ValidDate: 2001-08-01",
  "N300CNRLOK": "Central Oklahoma aquifer.     ValidDate: 2001-08-01",
  "N300COPLTS": "Colorado Plateaus aquifers.     ValidDate: 2001-08-01",
  "N300ERLMZC": "Early Mesozoic basin aquifers (eastern U.S.).     ValidDate: 2001-08-01",
  "N300JCBSVL": "Jacobsville aquifer (Michigan).     ValidDate: 2001-08-01",
  "N300LCRTCS": "Lower Cretaceous aquifers (northern Great Plains).     ValidDate: 2001-08-01",
  "N300LTRTRY": "Lower Tertiary aquifers (northern Great Plains).     ValidDate: 2001-08-01",
  "N300MRSHLL": "Marshall aquifer (Michigan).     ValidDate: 2001-08-01",
  "N300NYSDSN": "New York sandstone aquifers.     ValidDate: 2001-08-01",
  "N300PNSLVN": "Pennsylvanian aquifers (central and eastern U.S.).     ValidDate: 2001-08-01",
  "N300RSHSPG": "Rush Springs aquifer (Oklahoma).     ValidDate: 2001-08-01",
  "N300STHCST": "South Coast aquifer (Puerto Rico).     ValidDate: 2001-08-01",
  "N300UPCTCS": "Upper Cretaceous aquifers (northern Great Plains).     ValidDate: 2001-08-01",
  "N300WYTRTR": "Upper Tertiary aquifers (Wyoming).     ValidDate: 2001-08-01",
  "N400ABKSMP": "Arbuckle-Simpson aquifer (Oklahoma).     ValidDate: 2001-08-01",
  "N400BISCYN": "Biscayne aquifer (Florida).     ValidDate: 2001-08-01",
  "N400BLAINE": "Blaine aquifer (Oklahoma and Texas).     ValidDate: 2001-08-01",
  "N400BSNRGC": "Basin and Range carbonate-rock aquifers (southwestern U.S.).     ValidDate: 2001-08-01",
  "N400CSLHYN": "Castle Hayne aquifer (North Carolina).     ValidDate: 2001-08-01",
  "N400KNGSHL": "Kingshill aquifer (Virgin Islands).     ValidDate: 2001-08-01",
  "N400NCSTLM": "North Coast Limestone aquifer system (Puerto Rico).     ValidDate: 2001-08-01",
  "N400NYNECB": "New York and New England carbonate-rock aquifers.     ValidDate: 2001-08-01",
  "N400ORDVCN": "Ordovician aquifers (Tennessee and Kentucky).     ValidDate: 2001-08-01",
  "N400PDMBRC": "Piedmont and Blue Ridge carbonate-rock aquifers (eastern U.S.).     ValidDate: 2001-08-01",
  "N400PDMBRX": "Piedmont and Blue Ridge crystalline-rock aquifers (eastern U.S.).     ValidDate: 2001-08-01",
  "N400SLRDVN": "Silurian-Devonian aquifers (northern Midwest).     ValidDate: 2001-08-01",
  "N400UPCRBN": "Upper carbonate aquifer (Minnesota and Iowa).     ValidDate: 2001-08-01",
  "N500MSSPPI": "Mississippian aquifers (central and eastern U.S.).     ValidDate: 2001-08-01",
  "N500PLOZOC": "Paleozoic aquifers (northern Great Plains).     ValidDate: 2001-08-01",
  "N500VLRDGC": "(Should be included in Valley and Ridge aquifers.).     ValidDate: 2001-08-01",
  "N500VLYRDG": "Valley and Ridge aquifers (eastern U.S.).     ValidDate: 2001-08-01",
  "N600CMBPLV": "Columbia Plateau basaltic-rock aquifers.     ValidDate: 2001-08-01",
  "N600HIVLCC": "Hawaiian aquifers (Hawaii).     ValidDate: 2001-08-01",
  "N600NECRSN": "GW Atlas: Crystalline-rock aquifers (New York and New England).     ValidDate: 2001-08-01",
  "N600SKRVPB": "Snake River Plain basin-fill aquifers (Idaho).     ValidDate: 2001-08-01",
  "N600SKRVPV": "Snake River Plain basaltic-rock aquifers (Idaho).     ValidDate: 2001-08-01",
  "N600SRNVDV": "Southern Nevada volcanic-rock aquifers.     ValidDate: 2001-08-01",
  "N9999OTHER": "Other aquifers.     ValidDate: 2001-08-01",
  "S100CNRLVL": "Central Valley aquifer system (California).     ValidDate: 2001-08-01",
  "S100CSLLWD": "Coastal lowlands aquifer system (Gulf Coast).     ValidDate: 2001-08-01",
  "S100MSEMBM": "Mississippi embayment aquifer system.     ValidDate: 2001-08-01",
  "S100NATLCP": "Northern Atlantic Coastal Plain aquifer system.     ValidDate: 2001-08-01",
  "S100NRMTIB": "Northern Rocky Mountains Intermontane Basins aquifer system.     ValidDate: 2001-08-01",
  "S100PGTSND": "Puget Sound aquifer system (Washington).     ValidDate: 2001-08-01",
  "S100RIOGRD": "Rio Grande aquifer system.     ValidDate: 2001-08-01",
  "S100SECSLP": "Southeastern Coastal Plain aquifer system.     ValidDate: 2001-08-01",
  "S100SURFCL": "Surficial aquifer system (eastern U.S.).     ValidDate: 2001-08-01",
  "S100TXCLUP": "Texas coastal uplands aquifer system.     ValidDate: 2001-08-01",
  "S300CAMORD": "Cambrian-Ordovician aquifer system (northern Midwest).     ValidDate: 2001-08-01",
  "S300DNVRBS": "Denver Basin aquifer system.     ValidDate: 2001-08-01",
  "S400FLORDN": "Floridan aquifer system.     ValidDate: 2001-08-01",
  "S400OZRKPL": "Ozark Plateaus aquifer system (Missouri).     ValidDate: 2001-08-01",
  "S400RSWLBS": "Roswell Basin aquifer system (New Mexico).     ValidDate: 2001-08-01",
  "S500EDRTRN": "Edwards-Trinity aquifer system (Texas and Oklahoma).     ValidDate: 2001-08-01",
  "S500INTRMD": "GW Atlas: Intermediate aquifer system (Florida).     ValidDate: 2001-08-01",
  "S500NGRTPL": "(Includes four national aquifers but is not considered a national aquifer itself. The component aquifers are Lower Tertiary, Upper Cretaceous, Lower Cretaceous, and Paleozoic.).     ValidDate: 2001-08-01"
}