Iowa's Major Water Sources
Surface Water
Rivers, Streams
Lakes, Ponds, Quarries
lowa aquifers, from bottom to top:
Alluvial Aquifer
Buried Sand and Gravel Aquifer
Dakota Aquifer
Mississippiian Aquifer
Silurian-Devonian Aquifer
Upper Ordovician Aquifer
“Jordan” or Cambrian-Ordovician Aquifer
“Unconsolidated” aquifers (glaciers and rivers)
Bedrock aquifers (shallow seas)