NGDS - National Geothermal Data System

Permitted private wells. Iowa Hydrogeologic Map Server - Private Well Tracking System

Permitted private wells. Iowa Hydrogeologic Map Server - Private Well Tracking System

Elevation of water level within Devonian-age strata

Elevation of water level within Devonian-age strata

Thickness of Pennsylvanian-age strata. This unit acts as an aquitard over most of Iowa.

Thickness of Pennsylvanian-age strata. This unit acts as an aquitard over most of Iowa.

Sinkholes are indicative of karst processes which have the potential to adversely impact well construction.

Sinkholes are indicative of karst processes which have the potential to adversely impact well construction.

Elevation of water level within Maquoketa Formation aquifer.

Elevation of water level within Maquoketa Formation aquifer.

Estimated yield from the Cambrian-Ordovician aquifer, assuming 50% drawdown over the thickness of the aquifer (10 ft. pump allowance)

Estimated yield from the Cambrian-Ordovician aquifer, assuming 50% drawdown over the thickness of the aquifer (10 ft. pump allowance)

Surface elevation of Cretaceous-age strata, including the Dakota aquifer.

Surface elevation of Cretaceous-age strata, including the Dakota aquifer.

Elevation of water level within Mississippian-age strata.

Elevation of water level within Mississippian-age strata.

Elevation of water level within Cretaceous-age strata, including the Dakota aquifer.

Elevation of water level within Cretaceous-age strata, including the Dakota aquifer.

Elevation of water level within Silurian-age strata

Elevation of water level within Silurian-age strata

92 datasets found